CNMI Consumer Price Index: SAIPAN

Explanatory NotesQuarterly InflationAnnual InflationFurther Analysis of the IndexAppendix 1Appendix 2Appendix 3

CPI Construction and Methodology

Survey Overview
Over a 3-month period from October to December 2005, the Central Statistics Division (CSD) of the Commonwealth of the Northern Mariana Islands’ Department of Commerce conducted a Household Income and Expenditure Survey (HIES). This survey used two types of survey methods to gather data. For the more expensive and less frequently purchased items, such as major appliances, electronic goods, new and used vehicles, etc., a pre-printed, survey questionnaire was completed by an interviewer. For those items which are more frequently purchased, such as food, tobacco, drinks, etc., the household respondent was given a diary to record all purchases during a one-week period.
Household Sample
A random sample of 1,200 households was selected for the HIES in Saipan, which is the capital and the most populated island in the CNMI and about 125 households were selected from each of the islands of Rota and Tinian. From that initial sample, 1,141 households completed the survey questionnaire. From those households, a sub-sample of 700 households was given a diary to record household purchases.
Selection of the Item Sample
In December of 2007, Justin H. Andrew of CSD and Dr. Michael J. Levin, from Harvard University processed the data. Assisting them in 2008 were Mr. Wil Maui of DataTalks and Mr. Brian Hannon, an Economic Statistics International Consultant was hired to assist the CSD in rebasing the CPI. The survey items and expenditures were arrayed using the U.S. Bureau of Labor Statistics CPI classification system as a frame of reference. Then, using a statistical technique called “Probability Proportional to Size”; the CSD selected a new item sample. Using the PPS technique to select the item sample ensured that those items with the highest monthly household expenditures were selected in the sample. The sample included a total of 161 items for Saipan, 147 for Tinian, and 129 for Rota.
Expanding the Major Groups
Using the BLS Classification System as a frame of reference allowed the CSD to expand the number of groups included in the CNMI’s CPI. Instead of having five (5) major groups, the revised CPI now has nine (9) major groups. Having more groups allows the users to understand better which groups are responsible for the increases/decreases of the CPI. In the previous CPI, for example, alcoholic beverages were a part of the Health and Recreation Group. Now, it is one of the 4 new groups. The others are: Medical Care, Education and Communication and Other Goods and Services.
Expansion of the Outlet Sample
The previous CPI collected price data from 18 different outlets. In the revised CPI, the number of retail outlets has been expanded dramatically and the outlet sample now consists of roughly 170 different retail outlets in Saipan, 30 in Tinian and 60 in Rota, which are geographically dispersed throughout Saipan, Rota and Tinian. This substantially larger outlet sample will ensure that the retail price data are collected from a wide variety of outlets dispersed throughout the three locations.
Data Collection and Price Review Manual
The CSD has made another enhancement to the CPI by increasing the data collection training and by formalizing this vital aspect of price collection by developing a Data Collection Manual. This new manual covers virtually all aspects of price collection ranging from initiating the retail outlet to the rules for selecting a retail item and re-pricing. This new manual will improve data collection quality because it will provide guidance to the data collectors in handling almost any type of re-pricing situation.
Linking the Old and New CPIs
In the 4thQuarter of 2008, data collectors collected price data for both the old and revised CPIs and the two indexes were “spliced” together at that point. In order for two indexes to be linked together, there must be at least one period where prices are collected for both the old and the new indexes. This overlapping period was the 4th Quarter 2008. Beginning in the 1stQuarter 2009, the CSD collected price data for only the items in the revised CPI. Therefore, up to the 4th Quarter 2008, the index change is based on the old basket of goods, whereas from 1st Quarter 2009 onwards, the index change is based on the new basket.
Changing the Base Period
Another change in the CPI was rebasing it from the 1stQuarter 2003 = 100 to the 4thQuarter 2008 = 100. This is a mathematical change in the CPI but the more recent base period will make the CPI easier for users to understand. There is no difference in the percent changes from the old CPI from one period to another.
Calculationg the Consumer Price Index
As with most CPIs around the world, the CSD will continue to use the Laspeyres method to calculate the CPI. This is the most widely-used and internationally-accepted method of calculating price change for a CPI. The Laspeyres formula is shown below:
Laspeyres Formula:
CNMI CPI Formula
This method of index computation uses the quantities of commodities purchased in the base period as the basis for computing the value of the “market basket.” First, there are n number of items in the market basket with each having a base quantity. Each of these items has a base price, p0 and current price, pi. Multiplying p0 with q0 gives the total expenditure for a particular commodity for the base period. Current expenditure for an item is obtained by multiplying pi with q0. The sum of current expenditures for all items in the market basket is expressed as ? piq0, while the sum ?p0q0 is the total market basket expenditures in the base period. Notice that in both summations the term q0 remains constant, which means by using the same quantities only price changes are reflected in two pricing periods.

For those unfamiliar with statistical notation, trying to read and understand the above explanation can be an intimidating experience. In layman’s terms, the above simply means that all of the items in the CPI are priced every quarter and the prices for each item in the current quarter are compared to the same prices in the base period. The base period is the 4thquarter 2008 when the CPI was set equal to 100. That is when the CPIs for each of the 9 major groups and the All Items = 100.

The CSD uses a slight variation to this formula. Each quarter, the average of the prices that are collected for each item are compared to the average of the same prices in the previous quarter – not the base period. This is only done for items which are priced in both quarters. The average of the prices of an item in the current quarter is divided by the average of the prices in the previous quarter to calculate a price relative. This price relative is multiplied by the item’s weight in the previous quarter to update the item’s weight in the current quarter. This product is then divided by the item’s weight in the base period to calculate an item’s CPI. By summing the updated weights for all of the items in a group and dividing that sum by the same weights in the base period will calculate the group’s current CPI.

Section 1: Quarterly Inflation

Table 1 below shows the quarterly inflation rate for each quarter since the 4thquarter 2012, by group.
As can be seen from this table the index increased by 3.5 percent for the 1st quarter.
The trend for “All Items” can also be seen in Chart 1, illustrating the slight increase for this quarter (see Appendix 2 for a longer series of quarterly changes).
As can be seen from Chart 2, all groups showed negligible changes compared to last quarter.

CNMI CPI Table1: Quarterly Inflation, by Group, Saipan

    All Items Food Alcoholic
Beverages
Housing
&
Utilities
Apparel Transportation Medical
Care
Recreation Education
&
Communication
Other
Goods
&
Services
Source: CNMI Consumer Price Index
2017 2nd Qtr 0.2 -0.1 0.0 0.5 2.5 -0.7 0.0 0.0 0.1 2.5
2017 1st Qtr 3.2 0.8 0.0 12.6 -2.6 0.0 0.1 -0.4 0.0 1.2
2016 4th Qtr 0.3 0.0 0.0 0.9 0.0 0.4 0.0 -0.3 0.0 0.0
2016 3rd Qtr 0.2 -1.2 0.9 -0.4 -0.1 2.1 0.0 0.2 0.0 0.3
2016 2nd Qtr 1.3 0.5 -3.1 3.5 -0.2 1.7 0.0 0.0 0.0 0.1
2016 1st Qtr 0.3 -0.4 0.0 -3.8 0.0 -1.9 0.3 44.4 7.0 -0.1
2015 4th Qtr 0.1 0.3 0.0 0.1 0.1 0.0 0.0 0.0 0.0 0.0
2015 3rd Qtr -1.5 -0.3 2.6 -3.2 0.0 -2.7 0.0 -0.1 0.1 0.1
2015 2nd Qtr 0.9 0.1 0.0 2.4 0.0 1.0 0.0 -0.3 0.0 0.0
2015 1st Qtr -3.5 0.7 0.0 -6.7 1.2 -8.0 0.0 -0.2 0.0 4.3
2014 4th Qtr 0.4 3.4 0.5 -3.3 0.3 1.6 0.1 0.0 -0.4 11.2
2014 3rd Qtr -0.6 0.1 0.0 -1.9 -1.7 0.0 0.1 -2.1 0.5 0.0
2014 2nd Qtr 0.8 0.7 1.4 1.4 0.1 0.7 0.1 2.2 0.0 0.0
2014 1st Qtr 0.5 1.8 0.9 -0.5 1.0 1.1 0.2 0.4 -1.5 0.1
2013 4th Qtr -0.2 0.0 0.0 -0.2 0.0 -0.7 0.0 -0.1 0.0 -0.2
2013 3rd Qtr -1.0 1.3 2.0 0.0 -0.5 0.6 -10.3 -0.4 0.3 0.3
2013 2nd Qtr -0.2 0.2 0.0 0.1 -0.9 -0.7 0.0 0.0 0.0 0.0
2013 1st Qtr -1.1 0.2 1.7 0.3 -0.3 -3.3 1.1 -0.5 -10.1 0.0
2012 4th Qtr 1.1 -0.2 0.0 1.7 -1.5 2.0 1.7 -0.1 0.4 0.0
2012 3rd Qtr 0.3 0.0 0.5 -0.8 -2.2 1.8 1.0 -0.2 0.5 0.1
2012 2nd Qtr -0.8 0.2 1.5 -0.6 -0.6 -3.4 2.1 0.0 -1.1 0.2
2012 1st Qtr 0.5 -0.1 3.4 0.1 -1.2 1.6 -0.1 2.7 -0.2 0.2
2011 4th Qtr 0.1 -0.4 -4.4 0.5 1.3 0.1 0.0 -0.9 0.6 0.2
2011 3rd Qtr 2.8 1.4 0.4 1.2 0.8 2.6 13.3 0.0 0.4 0.2
2011 2nd Qtr 0.8 2.6 0.0 0.3 -0.4 1.1 0.0 -0.2 0.0 0.2
2011 1st Qtr -1.4 2.0 0.7 -6.7 -0.6 0.4 -0.1 1.5 -0.3 5.6
2010 4th Qtr 4.0 1.3 2.6 1.0 0.2 6.0 19.9 -0.3 -0.4 1.9
2010 3rd Qtr 0.3 -0.4 0.0 0.1 -0.1 2.1 -1.0 -0.9 -0.2 -0.1
2010 2nd Qtr 0.5 0.4 0.0 1.1 -2.5 0.7 0.1 0.8 0.0 1.7
2010 1st Qtr 0.6 -1.5 0.9 -0.9 -1.5 4.8 2.0 -2.1 -0.7 -0.4
2009 4th Qtr 3.4 -0.4 0.0 9.3 0.9 2.9 0.1 0.2 0.3 0.4
2009 3rd Qtr 0.3 2.5 0.4 -2.8 3.4 1.3 -3.2 0.4 8.7 1.0
2009 2nd Qtr 1.7 1.4 8.4 1.5 0.0 3.4 0.0 3.2 -0.1 0.0
2009 1st Qtr 0.0 0.9 -2.2 -1.1 0.0 0.5 1.6 0.0 -2.8 1.5
2008 4th Qtr -3.8 2.6 0.8 -14.0 0.5 4.3 3.0 0.0 0.5 0.0
2008 3rd Qtr -1.0 4.3 3.5 -3.2 -0.6 -3.3 -2.9 -0.5 1.0 7.7
2008 2nd Qtr 11.9 0.3 0.8 32.7 -1.1 3.4 0.0 -2.9 0.0 0.0
2008 1st Qtr -1.4 4.2 2.1 -6.7 0.1 0.0 7.1 1.5 -0.1 0.0
2007 4th Qtr 0.3 1.0 0.4 0.3 0.0 0.0 0.0 0.3 0.0 0.0
2007 3rd Qtr 0.1 0.4 0.0 0.1 0.2 0.0 0.0 0.4 0.0 0.0
2007 2nd Qtr 2.2 1.3 0.0 5.6 0.3 0.0 1.1 0.1 -0.2 0.0
2007 1st Qtr 0.5 1.7 3.8 0.3 1.6 0.0 0.0 0.3 0.4 0.0
2006 4th Qtr 0.6 2.0 0.1 0.6 0.3 0.0 0.0 -1.1 0.5 0.0
2006 3rd Qtr 10.9 1.1 0.0 38.5 1.0 0.0 0.0 2.1 0.1 0.0
2006 2nd Qtr 0.3 0.1 0.0 1.0 0.5 0.0 0.0 0.6 0.0 0.0
2006 1st Qtr 1.3 1.1 0.5 1.6 13.4 0.3 6.5 2.6 0.6 0.0
2005 4th Qtr 0.6 -0.4 0.1 2.3 -0.6 0.0 -0.2 0.8 1.1 0.0
2005 3rd Qtr 0.2 0.3 0.4 0.1 -3.6 0.3 0.1 -0.7 1.4 0.0
2005 2nd Qtr 0.3 0.7 1.3 0.1 -1.4 0.1 0.0 2.7 0.4 0.0
2005 1st Qtr 0.1 -0.5 0.1 0.2 5.8 0.4 0.0 0.2 -2.9 0.0
2004 4th Qtr 0.7 2.1 -0.2 0.6 -3.0 0.2 0.0 -0.3 2.2 0.0
2004 3rd Qtr -0.4 1.1 0.4 -0.3 -4.3 -0.9 0.0 -2.6 -0.9 0.0
2004 2nd Qtr 0.7 1.0 -0.2 -0.6 -1.1 0.4 0.0 6.2 0.1 8.3
2004 1st Qtr 0.6 2.6 0.0 0.4 0.4 0.0 0.0 -0.7 -0.1 0.0
2003 4th Qtr -0.2 -0.1 -0.1 -1.3 -0.4 0.8 0.0 -2.8 -0.6 0.0
2003 3rd Qtr -0.1 0.4 -0.2 -0.8 0.8 0.0 0.0 -0.3 0.4 0.0
2003 2nd Qtr -0.1 0.3 0.2 0.0 0.2 -0.3 0.0 -0.7 -0.2 0.0
2003 1st Qtr

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CNMI CPI Chart1 2017

CNMI CPI Chart2 2017

Section 2: Annual Inflation

Table 2 below shows the annual inflation rate for each year since the 1st quarter 2007, by group.
As can be seen from this table the index increased by 5.1 percent over the last 12 months.
The table clearly shows the major increase in the cost of living for Saipan took place for the year ending 1st qtr 2007 (12.5%).
The trend for “All Items” can also be seen in Chart 3.
As can be seen from Chart 4, the group which increased the most was “Housing & Utilities”, with 17.1 percent growth, when compared to the same quarter last year.
“Transportation” group showed the next largest increase which rose by 4.2 percent meanwhile “Apparel” group showed the largest decrease (2.9%).

CNMI CPI Table2: Annual Inflation, by Group, Saipan

    All Items Food Alcoholic
Beverages
Housing
&
Utilities
Apparel Transportation Medical
Care
Recreation Education
&
Communication
Other
Goods
&
Services
Source: CNMI Consumer Price Index
2017 2nd Qtr 3.9 -0.5 0.9 13.7 -0.3 1.8 0.1 -0.4 0.1 4.1
2017 1st Qtr 5.1 0.1 -2.2 17.1 -2.9 4.2 0.1 -0.4 0.0 1.7
2016 4th Qtr 2.1 -1.1 -2.2 -0.1 -0.3 2.3 0.3 44.4 7.0 0.3
2016 3rd Qtr 1.9 -0.8 -2.2 -0.8 -0.2 1.9 0.3 44.7 7.0 0.3
2016 2nd Qtr 0.1 0.1 -0.5 -3.6 -0.1 -2.9 0.3 44.3 7.1 0.0
2016 1st Qtr -0.3 -0.3 2.6 -4.7 0.0 -3.6 0.3 43.9 7.1 -0.1
2015 4th Qtr -4.1 0.8 2.6 -7.5 1.2 -9.6 0.0 -0.5 0.1 4.4
2015 3rd Qtr -3.7 3.9 3.1 -10.7 1.5 -8.1 0.1 -0.5 -0.2 16.0
2015 2nd Qtr -2.9 4.3 0.5 -9.4 -0.2 -5.6 0.2 -2.5 0.1 15.9
2015 1st Qtr -2.9 5.0 1.8 -10.3 -0.2 -5.9 0.3 -0.1 0.1 16.0
2014 4th Qtr 1.1 6.2 2.8 -4.3 -0.3 3.4 0.5 0.5 -1.5 11.3
2014 3rd Qtr 0.4 2.7 2.3 -1.2 -0.7 1.1 0.4 0.3 -1.1 0.0
2014 2nd Qtr 0.0 4.0 4.3 0.6 0.6 1.7 -10.1 2.0 -1.2 0.2
2014 1st Qtr -0.9 3.4 2.9 -0.7 -0.4 0.2 -10.1 -0.2 -1.2 0.2
2013 4th Qtr -2.5 1.8 3.7 0.1 -1.7 -4.1 -9.3 -1.0 -9.9 0.1
2013 3rd Qtr -1.2 1.6 3.7 2.0 -3.1 -1.5 -7.8 -1.0 -9.5 0.3
2013 2nd Qtr 0.1 0.3 2.2 1.3 -4.8 -0.2 3.8 -0.8 -9.3 0.1
2013 1st Qtr -0.5 0.2 3.7 0.6 -4.6 -2.9 6.0 -0.8 -10.2 0.3
2012 4th Qtr 1.1 0.0 5.5 0.5 -5.4 2.0 4.8 2.4 -0.3 0.4
2012 3rd Qtr 0.1 -0.2 0.8 -0.7 -2.7 0.1 3.0 1.5 -0.1 0.6
2012 2nd Qtr 2.7 1.1 0.8 1.3 0.3 0.9 15.6 1.7 -0.3 0.8
2012 1st Qtr 4.3 3.5 -0.7 2.3 0.5 5.6 13.2 1.6 0.8 0.8
2011 4th Qtr 2.3 5.7 -3.3 -4.7 1.1 4.3 13.2 0.4 0.7 6.2
2011 3rd Qtr 6.3 7.5 3.8 -4.3 0.0 10.5 35.7 1.1 -0.3 8.0
2011 2nd Qtr 3.7 5.7 3.3 -5.4 -0.9 9.9 18.6 0.2 -0.9 7.7
2011 1st Qtr 3.5 3.5 3.3 -4.7 -2.9 9.5 18.7 1.1 -0.9 9.4
2010 4th Qtr 5.5 -0.1 3.5 1.2 -3.8 14.3 21.2 -2.5 -1.3 3.2
2010 3rd Qtr 4.9 -1.8 0.9 9.6 -3.1 11.0 1.2 -2.1 -0.6 1.7
2010 2nd Qtr 4.8 1.0 1.3 6.4 0.2 10.2 -1.1 -0.8 8.3 2.8
2010 1st Qtr 6.0 2.0 9.8 6.8 2.8 13.1 -1.2 1.6 8.2 1.0
2009 4th Qtr 5.4 4.5 6.5 6.6 4.3 8.4 -1.6 3.8 5.8 3.0
2009 3rd Qtr -1.9 7.6 7.4 -16.1 3.9 9.8 1.3 3.6 6.0 2.5
2009 2nd Qtr -3.2 9.5 10.6 -16.5 -0.1 4.8 1.6 2.7 -1.5 9.3
2009 1st Qtr 6.5 8.3 2.9 9.2 -1.2 4.7 1.6 -3.4 -1.4 9.4
2008 4th Qtr 5.1 11.9 7.4 3.1 -1.0 4.2 7.1 -2.0 1.4 7.7
2008 3rd Qtr 9.6 10.2 7.0 20.3 -1.6 -0.1 4.0 -1.7 0.9 7.7
2008 2nd Qtr 10.9 6.1 3.4 24.3 -0.7 3.4 7.1 -0.8 -0.1 0.0
2008 1st Qtr 1.3 7.1 2.5 -1.0 0.6 0.0 8.3 2.4 -0.2 0.0
2007 4th Qtr 3.2 4.6 4.3 6.4 2.1 0.0 1.1 1.2 0.3 0.0
2007 3rd Qtr 3.5 5.6 3.9 6.7 2.4 0.0 1.1 -0.3 0.7 0.0
2007 2nd Qtr 14.6 6.3 3.9 47.6 3.2 0.0 1.1 1.4 0.9 0.0
2007 1st Qtr 12.5 5.0 3.9 41.1 3.4 0.0 0.0 1.9 1.0 0.0
2006 4th Qtr 13.4 4.4 0.6 43.0 15.4 0.3 6.5 4.2 1.2 0.0
2006 3rd Qtr 13.4 2.0 0.6 45.5 14.4 0.3 6.2 6.3 1.8 0.0
2006 2nd Qtr 2.4 1.2 0.9 5.2 9.2 0.6 6.3 3.4 3.0 0.0
2006 1st Qtr 2.4 1.8 2.2 4.2 7.1 0.7 6.3 5.6 3.4 0.0
2005 4th Qtr 1.2 0.2 1.8 2.8 0.0 0.8 -0.2 3.1 -0.1 0.0
2005 3rd Qtr 1.3 2.7 1.5 1.1 -2.5 1.0 0.1 1.9 1.0 0.0
2005 2nd Qtr 0.7 3.5 1.6 0.6 -3.2 -0.2 0.0 -0.1 -1.2 0.0
2005 1st Qtr 1.1 3.7 0.1 -0.1 -2.9 0.1 0.0 3.3 -1.5 8.3
2004 4th Qtr 1.6 6.8 0.0 0.1 -7.9 -0.3 0.0 2.4 1.3 8.3
2004 3rd Qtr 0.7 4.5 0.1 -1.8 -5.4 0.3 0.0 -0.2 -1.5 8.3
2004 2nd Qtr 1.0 3.8 -0.5 -2.3 -0.4 1.2 0.0 2.2 -0.2 8.3
2004 1st Qtr 0.2 3.1 -0.1 -1.7 0.9 0.5 0.0 -4.4 -0.5 0.0

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CNMI CPI Chart3 2017

CNMI CPI Chart4 2017

Section 3: Further Analysis of the Index

Table 3 and Chart 5 below show the change in the index since the re-base in the 4th Quarter 2008.
The analysis shows that most groups have increased during this time, with the exceptions of “Housing & Utilities”, “Apparel” and “Education & Communication” which show decreases ranging from about 5 percent to about 10 percent.
“Recreation” had the greatest increase of 48 percent in this period which was followed by “Other Goods & Services” with an increase of 32 percent.
For more details refer to Appendix 1.

CNMI CPI Table3: Consumer Price Index, by Group, Saipan

    All Items Food Alcoholic
Beverages
Housing
&
Utilities
Apparel Transportation Medical
Care
Recreation Education
&
Communication
Other
Goods
&
Services
Source: CNMI Consumer Price Index
2017 2nd Qtr 114.8 119.6 120.3 103.6 94.7 120.1 129.4 147.9 100.0 137.2
2017 1st Qtr 114.6 119.7 120.3 103.0 92.4 121.0 129.4 147.9 99.9 133.9
2016 4th Qtr 111.0 118.7 120.3 91.5 94.9 121.0 129.3 148.5 99.8 132.3
2016 3rd Qtr 110.7 118.7 120.3 90.7 94.9 120.6 129.3 148.9 99.8 132.2
2016 2nd Qtr 110.5 120.1 119.2 91.1 95.0 118.1 129.3 148.5 99.8 131.8
2016 1st Qtr 109.0 119.6 123.0 88.0 95.1 116.1 129.3 148.5 99.8 131.6
2015 4th Qtr 108.7 120.1 123.0 91.6 95.1 118.3 129.0 102.9 93.3 131.8
2015 3rd Qtr 108.6 119.7 123.0 91.5 95.1 118.3 129.0 102.9 93.3 131.8
2015 2nd Qtr 110.3 120.0 119.9 94.5 95.1 121.6 129.0 102.9 93.2 131.7
2015 1st Qtr 109.4 120.0 119.9 92.3 95.1 120.4 129.0 103.2 93.2 131.7
2014 4th Qtr 113.3 119.1 119.9 99.0 94.0 130.8 129.0 103.4 93.2 126.3
2014 3rd Qtr 112.8 115.2 119.3 102.4 93.7 128.8 128.8 103.4 93.5 113.6
2014 2nd Qtr 113.6 115.1 119.3 104.4 95.3 128.8 128.7 105.6 93.1 113.6
2014 1st Qtr 112.7 114.3 117.7 102.9 95.2 127.9 128.6 103.3 93.1 113.6
2013 4th Qtr 112.1 112.2 116.6 103.5 94.3 126.5 128.3 103.0 94.5 113.5
2013 3rd Qtr 112.4 112.2 116.6 103.7 94.3 127.3 128.3 103.1 94.5 113.7
2013 2nd Qtr 113.6 110.7 114.4 103.7 94.8 126.6 143.1 103.5 94.3 113.4
2013 1st Qtr 113.7 110.5 114.4 103.6 95.6 127.6 143.1 103.5 94.3 113.4
2012 4th Qtr 115.0 110.3 112.4 103.3 95.9 131.9 141.5 104.0 104.9 113.4
2012 3rd Qtr 113.8 110.5 112.4 101.6 97.4 129.3 139.2 104.1 104.4 113.4
2012 2nd Qtr 113.5 110.4 111.9 102.4 99.6 126.9 137.8 104.3 103.9 113.3
2012 1st Qtr 114.4 110.2 110.3 103.0 100.2 131.4 135.0 104.3 105.0 113.1
2011 4th Qtr 113.8 110.3 106.6 102.9 101.4 129.3 135.1 101.6 105.2 112.9
2011 3rd Qtr 113.7 110.8 111.5 102.3 100.1 129.1 135.1 102.6 104.6 112.7
2011 2nd Qtr 110.5 109.3 111.0 101.1 99.3 125.8 119.2 102.6 104.2 112.4
2011 1st Qtr 109.7 106.5 111.0 100.7 99.7 124.5 119.2 102.7 104.2 112.2
2010 4th Qtr 111.2 104.4 110.3 108.0 100.3 123.9 119.3 101.2 104.5 106.2
2010 3rd Qtr 106.9 103.0 107.5 106.9 100.1 116.9 99.5 101.4 104.9 104.3
2010 2nd Qtr 106.6 103.4 107.5 106.8 100.2 114.5 100.5 102.4 105.1 104.4
2010 1st Qtr 106.0 102.9 107.5 105.7 102.7 113.7 100.5 101.6 105.1 102.6
2009 4th Qtr 105.4 104.5 106.5 106.6 104.3 108.4 98.4 103.8 105.8 103.0
2009 3rd Qtr 101.9 104.9 106.5 97.6 103.4 105.3 98.4 103.6 105.5 102.5
2009 2nd Qtr 101.6 102.3 106.0 100.4 100.0 103.9 101.6 103.2 97.0 101.5
2009 1st Qtr 100.0 100.9 97.8 98.9 100.0 100.5 101.6 100.0 97.2 101.5
2008 4th Qtr 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0
2008 3rd Qtr 103.9 97.5 99.2 116.3 99.5 95.9 97.1 100.0 99.5 100.0
2008 2nd Qtr 105.0 93.5 95.8 120.2 100.1 99.2 100.0 100.5 98.5 92.9
2008 1st Qtr 93.8 93.1 95.1 90.6 101.2 96.0 100.0 103.6 98.5 92.9
2007 4th Qtr 95.1 89.4 93.1 97.0 101.0 96.0 93.3 102.0 98.6 92.9
2007 3rd Qtr 94.8 88.5 92.7 96.7 101.0 96.0 93.3 101.8 98.6 92.9
2007 2nd Qtr 94.7 88.1 92.7 96.7 100.8 96.0 93.3 101.3 98.6 92.9
2007 1st Qtr 92.7 86.9 92.7 91.5 100.5 96.0 92.3 101.2 98.7 92.9
2006 4th Qtr 92.2 85.5 89.3 91.2 98.9 96.0 92.3 100.8 98.3 92.9
2006 3rd Qtr 91.6 83.8 89.3 90.7 98.7 96.0 92.3 102.0 97.9 92.9
2006 2nd Qtr 82.6 82.9 89.2 65.5 97.7 96.0 92.3 99.9 97.8 92.9
2006 1st Qtr 82.4 82.8 89.2 64.8 97.2 96.0 92.3 99.3 97.8 92.9
2005 4th Qtr 81.3 81.8 88.8 63.8 85.7 95.7 86.7 96.8 97.2 92.9
2005 3rd Qtr 80.8 82.2 88.8 62.3 86.2 95.7 86.9 96.0 96.2 92.9
2005 2nd Qtr 80.7 81.9 88.4 62.2 89.5 95.4 86.8 96.6 94.9 92.9
2005 1st Qtr 80.4 81.3 87.3 62.2 90.8 95.3 86.8 94.1 94.5 92.8
2004 4th Qtr 80.4 81.7 87.2 62.1 85.8 94.9 86.8 93.9 97.3 92.8
2004 3rd Qtr 79.8 80.0 87.4 61.7 88.4 94.7 86.8 94.2 95.2 92.8
2004 2nd Qtr 80.1 79.2 87.1 61.9 92.4 95.6 86.8 96.7 96.0 92.8
2004 1st Qtr 79.6 78.4 87.2 62.3 93.4 95.2 86.8 91.0 96.0 85.7
2003 4th Qtr 79.1 76.4 87.2 62.0 93.1 95.2 86.8 91.7 96.0 85.7
2003 3rd Qtr 79.2 76.5 87.3 62.8 93.5 94.4 86.8 94.3 96.6 85.7
2003 2nd Qtr 79.3 76.3 87.5 63.3 92.8 94.4 86.8 94.6 96.2 85.7
2003 1st Qtr 79.4 76.0 87.3 63.3 92.6 94.7 86.8 95.2 96.4 85.7

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CNMI CPI Chart5 2017

CNMI CPI Appendix1 – Saipan Index

Year.Qtr All Items Food Alcoholic
Beverages
Housing
&
Utilities
Apparel Transportation Medical
Care
Recreation Education
&
Communication
Other
Goods
&
Services
Source: CNMI Consumer Price Index
Weights 100.0 17.1 1.4 30.4 6.1 22.2 10.7 3.4 5.6 3.1
2017.02 114.8 119.6 120.3 103.6 94.7 120.1 129.4 147.9 100.0 137.2
2017.01 114.6 119.7 120.3 103.0 92.4 121.0 129.4 147.9 99.9 133.9
2016.04 111.0 118.7 120.3 91.5 94.9 121.0 129.3 148.5 99.8 132.3
2016.03 110.7 118.7 120.3 90.7 94.9 120.6 129.3 148.9 99.8 132.2
2016.02 110.5 120.1 119.2 91.1 95.0 118.1 129.3 148.5 99.8 131.8
2016.01 109.0 119.6 123.0 88.0 95.1 116.1 129.3 148.5 99.8 131.6
2015.04 108.7 120.1 123.0 91.6 95.1 118.3 129.0 102.9 93.3 131.8
2015.03 108.6 119.7 123.0 91.5 95.1 118.3 129.0 102.9 93.3 131.8
2015.02 110.3 120.0 119.9 94.5 95.1 121.6 129.0 102.9 93.2 131.7
2015.01 109.4 120.0 119.9 92.3 95.1 120.4 129.0 103.2 93.2 131.7
2014.04 113.3 119.1 119.9 99.0 94.0 130.8 129.0 103.4 93.2 126.3
2014.03 112.8 115.2 119.3 102.4 93.7 128.8 128.8 103.4 93.5 113.6
2014.02 113.6 115.1 119.3 104.4 95.3 128.8 128.7 105.6 93.1 113.6
2014.01 112.7 114.3 117.7 102.9 95.2 127.9 128.6 103.3 93.1 113.6
2013.04 112.1 112.2 116.6 103.5 94.3 126.5 128.3 103.0 94.5 113.5
2013.03 112.4 112.2 116.6 103.7 94.3 127.3 128.3 103.1 94.5 113.7
2013.02 113.6 110.7 114.4 103.7 94.8 126.6 143.1 103.5 94.3 113.4
2013.01 113.7 110.5 114.4 103.6 95.6 127.6 143.1 103.5 94.3 113.4
2012.04 115.0 110.3 112.4 103.3 95.9 131.9 141.5 104.0 104.9 113.4
2012.03 113.8 110.5 112.4 101.6 97.4 129.3 139.2 104.1 104.4 113.4
2012.02 113.5 110.4 111.9 102.4 99.6 126.9 137.8 104.3 103.9 113.3
2012.01 114.4 110.2 110.3 103.0 100.2 131.4 135.0 104.3 105.0 113.1
2011.04 113.8 110.3 106.6 102.9 101.4 129.3 135.1 101.6 105.2 112.9
2011.03 113.7 110.8 111.5 102.3 100.1 129.1 135.1 102.6 104.6 112.7
2011.02 110.5 109.3 111.0 101.1 99.3 125.8 119.2 102.6 104.2 112.4
2011.01 109.7 106.5 111.0 100.7 99.7 124.5 119.2 102.7 104.2 112.2
2010.04 111.2 104.4 110.3 108.0 100.3 123.9 119.3 101.2 104.5 106.2
2010.03 106.9 103.0 107.5 106.9 100.1 116.9 99.5 101.4 104.9 104.3
2010.02 106.6 103.4 107.5 106.8 100.2 114.5 100.5 102.4 105.1 104.4
2010.01 106.0 102.9 107.5 105.7 102.7 113.7 100.5 101.6 105.1 102.6
2009.04 105.4 104.5 106.5 106.6 104.3 108.4 98.4 103.8 105.8 103.0
2009.03 101.9 104.9 106.5 97.6 103.4 105.3 98.4 103.6 105.5 102.5
2009.02 101.6 102.3 106.0 100.4 100.0 103.9 101.6 103.2 97.0 101.5
2009.01 100.0 100.9 97.8 98.9 100.0 100.5 101.6 100.0 97.2 101.5
2008.04 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0
2008.03 103.9 97.5 99.2 116.3 99.5 95.9 97.1 100.0 99.5 100.0
2008.02 105.0 93.5 95.8 120.2 100.1 99.2 100.0 100.5 98.5 92.9
2008.01 93.8 93.1 95.1 90.6 101.2 96.0 100.0 103.6 98.5 92.9
2007.04 95.1 89.4 93.1 97.0 101.0 96.0 93.3 102.0 98.6 92.9
2007.03 94.8 88.5 92.7 96.7 101.0 96.0 93.3 101.8 98.6 92.9
2007.02 94.7 88.1 92.7 96.7 100.8 96.0 93.3 101.3 98.6 92.9
2007.01 92.7 86.9 92.7 91.5 100.5 96.0 92.3 101.2 98.7 92.9
2006.04 92.2 85.5 89.3 91.2 98.9 96.0 92.3 100.8 98.3 92.9
2006.03 91.6 83.8 89.3 90.7 98.7 96.0 92.3 102.0 97.9 92.9
2006.02 82.6 82.9 89.2 65.5 97.7 96.0 92.3 99.9 97.8 92.9
2006.01 82.4 82.8 89.2 64.8 97.2 96.0 92.3 99.3 97.8 92.9
2005.04 81.3 81.8 88.8 63.8 85.7 95.7 86.7 96.8 97.2 92.9
2005.03 80.8 82.2 88.8 62.3 86.2 95.7 86.9 96.0 96.2 92.9
2005.02 80.7 81.9 88.4 62.2 89.5 95.4 86.8 96.6 94.9 92.9
2005.01 80.4 81.3 87.3 62.2 90.8 95.3 86.8 94.1 94.5 92.8
2004.04 80.4 81.7 87.2 62.1 85.8 94.9 86.8 93.9 97.3 92.8
2004.03 79.8 80.0 87.4 61.7 88.4 94.7 86.8 94.2 95.2 92.8
2004.02 80.1 79.2 87.1 61.9 92.4 95.6 86.8 96.7 96.0 92.8
2004.01 79.6 78.4 87.2 62.3 93.4 95.2 86.8 91.0 96.0 85.7
2003.04 79.1 76.4 87.2 62.0 93.1 95.2 86.8 91.7 96.0 85.7
2003.03 79.2 76.5 87.3 62.8 93.5 94.4 86.8 94.3 96.6 85.7
2003.02 79.3 76.3 87.5 63.3 92.8 94.4 86.8 94.6 96.2 85.7
2003.01 79.4 76.0 87.3 63.3 92.6 94.7 86.8 95.2 96.4 85.7

CNMI CPI Appendix2 – Saipan Quarterly Change

Year.Qtr All Items Food Alcoholic
Beverages
Housing
&
Utilities
Apparel Transportation Medical
Care
Recreation Education
&
Communication
Other
Goods
&
Services
Source: CNMI Consumer Price Index
Weights 100.0 17.1 1.4 30.4 6.1 22.2 10.7 3.4 5.6 3.1
2017.02 0.2 -0.1 0.0 0.5 2.5 -0.7 0.0 0.0 0.1 2.5
2017.01 3.2 0.8 0.0 12.6 -2.6 0.0 0.1 -0.4 0.0 1.2
2016.04 0.3 0.0 0.0 0.9 0.0 0.4 0.0 -0.3 0.0 0.0
2016.03 0.2 -1.2 0.9 -0.4 -0.1 2.1 0.0 0.2 0.0 0.3
2016.02 1.3 0.5 -3.1 3.5 -0.2 1.7 0.0 0.0 0.0 0.1
2016.01 0.3 -0.4 0.0 -3.8 0.0 -1.9 0.3 44.4 7.0 -0.1
2015.04 0.1 0.3 0.0 0.1 0.1 0.0 0.0 0.0 0.0 0.0
2015.03 -1.5 -0.3 2.6 -3.2 0.0 -2.7 0.0 -0.1 0.1 0.1
2015.02 0.9 0.1 0.0 2.4 0.0 1.0 0.0 -0.3 0.0 0.0
2015.01 -3.5 0.7 0.0 -6.7 1.2 -8.0 0.0 -0.2 0.0 4.3
2014.04 0.4 3.4 0.5 -3.3 0.3 1.6 0.1 0.0 -0.4 11.2
2014.03 -0.6 0.1 0.0 -1.9 -1.7 0.0 0.1 -2.1 0.5 0.0
2014.02 0.8 0.7 1.4 1.4 0.1 0.7 0.1 2.2 0.0 0.0
2014.01 0.5 1.8 0.9 -0.5 1.0 1.1 0.2 0.4 -1.5 0.1
2013.04 -0.2 0.0 0.0 -0.2 0.0 -0.7 0.0 -0.1 0.0 -0.2
2013.03 -1.0 1.3 2.0 0.0 -0.5 0.6 -10.3 -0.4 0.3 0.3
2013.02 -0.2 0.2 0.0 0.1 -0.9 -0.7 0.0 0.0 0.0 0.0
2013.01 -1.1 0.2 1.7 0.3 -0.3 -3.3 1.1 -0.5 -10.1 0.0
2012.04 1.1 -0.2 0.0 1.7 -1.5 2.0 1.7 -0.1 0.4 0.0
2012.03 0.3 0.0 0.5 -0.8 -2.2 1.8 1.0 -0.2 0.5 0.1
2012.02 -0.8 0.2 1.5 -0.6 -0.6 -3.4 2.1 0.0 -1.1 0.2
2012.01 0.5 -0.1 3.4 0.1 -1.2 1.6 -0.1 2.7 -0.2 0.2
2011.04 0.1 -0.4 -4.4 0.5 1.3 0.1 0.0 -0.9 0.6 0.2
2011.03 2.8 1.4 0.4 1.2 0.8 2.6 13.3 0.0 0.4 0.2
2011.02 0.8 2.6 0.0 0.3 -0.4 1.1 0.0 -0.2 0.0 0.2
2011.01 -1.4 2.0 0.7 -6.7 -0.6 0.4 -0.1 1.5 -0.3 5.6
2010.04 4.0 1.3 2.6 1.0 0.2 6.0 19.9 -0.3 -0.4 1.9
2010.03 0.3 -0.4 0.0 0.1 -0.1 2.1 -1.0 -0.9 -0.2 -0.1
2010.02 0.5 0.4 0.0 1.1 -2.5 0.7 0.1 0.8 0.0 1.7
2010.01 0.6 -1.5 0.9 -0.9 -1.5 4.8 2.0 -2.1 -0.7 -0.4
2009.04 3.4 -0.4 0.0 9.3 0.9 2.9 0.1 0.2 0.3 0.4
2009.03 0.3 2.5 0.4 -2.8 3.4 1.3 -3.2 0.4 8.7 1.0
2009.02 1.7 1.4 8.4 1.5 0.0 3.4 0.0 3.2 -0.1 0.0
2009.01 0.0 0.9 -2.2 -1.1 0.0 0.5 1.6 0.0 -2.8 1.5
2008.04 -3.8 2.6 0.8 -14.0 0.5 4.3 3.0 0.0 0.5 0.0
2008.03 -1.0 4.3 3.5 -3.2 -0.6 -3.3 -2.9 -0.5 1.0 7.7
2008.02 11.9 0.3 0.8 32.7 -1.1 3.4 0.0 -2.9 0.0 0.0
2008.01 -1.4 4.2 2.1 -6.7 0.1 0.0 7.1 1.5 -0.1 0.0
2007.04 0.3 1.0 0.4 0.3 0.0 0.0 0.0 0.3 0.0 0.0
2007.03 0.1 0.4 0.0 0.1 0.2 0.0 0.0 0.4 0.0 0.0
2007.02 2.2 1.3 0.0 5.6 0.3 0.0 1.1 0.1 -0.2 0.0
2007.01 0.5 1.7 3.8 0.3 1.6 0.0 0.0 0.3 0.4 0.0
2006.04 0.6 2.0 0.1 0.6 0.3 0.0 0.0 -1.1 0.5 0.0
2006.03 10.9 1.1 0.0 38.5 1.0 0.0 0.0 2.1 0.1 0.0
2006.02 0.3 0.1 0.0 1.0 0.5 0.0 0.0 0.6 0.0 0.0
2006.01 1.3 1.1 0.5 1.6 13.4 0.3 6.5 2.6 0.6 0.0
2005.04 0.6 -0.4 0.1 2.3 -0.6 0.0 -0.2 0.8 1.1 0.0
2005.03 0.2 0.3 0.4 0.1 -3.6 0.3 0.1 -0.7 1.4 0.0
2005.02 0.3 0.7 1.3 0.1 -1.4 0.1 0.0 2.7 0.4 0.0
2005.01 0.1 -0.5 0.1 0.2 5.8 0.4 0.0 0.2 -2.9 0.0
2004.04 0.7 2.1 -0.2 0.6 -3.0 0.2 0.0 -0.3 2.2 0.0
2004.03 -0.4 1.1 0.4 -0.3 -4.3 -0.9 0.0 -2.6 -0.9 0.0
2004.02 0.7 1.0 -0.2 -0.6 -1.1 0.4 0.0 6.2 0.1 8.3
2004.01 0.6 2.6 0.0 0.4 0.4 0.0 0.0 -0.7 -0.1 0.0
2003.04 -0.2 -0.1 -0.1 -1.3 -0.4 0.8 0.0 -2.8 -0.6 0.0
2003.03 -0.1 0.4 -0.2 -0.8 0.8 0.0 0.0 -0.3 0.4 0.0
2003.02 -0.1 0.3 0.2 0.0 0.2 -0.3 0.0 -0.7 -0.2 0.0
2003.01

CNMI CPI Appendix 3 – CPI Weights for each Islands

    Saipan Tinian Rota
Source: CNMI Consumer Price Index
Food All Food 17.1083 21.0482 12.9058
Food Cereal Products 2.7052 4.6227 2.6345
Food Meat Products 4.0402 6.0270 3.1488
Food Seafood Produce 1.4994 0.8986 N/A
Food Dairy Produce 1.5335 2.0349 1.4826
Food Fruit 0.3195 0.5851 0.0762
Food Vegetables 1.0487 1.1897 0.9914
Food Non-alcoholic Beverages 1.6493 2.8072 1.5779
Food Confectionery 0.3072 0.2004 0.2269
Food Miscellaneous Food 0.5690 1.2973 0.5522
Food Take-away Food 3.4363 1.3853 2.2153
Alcoholic Beverages Alcoholic Beverages 1.3768 3.1933 1.5890
Housing & Utilities All Housing & Utilities 30.3859 31.1513 44.6249
Housing & Utilities Housing 15.1278 7.8888 13.7889
Housing & Utilities Utilities 10.0594 12.0407 14.5987
Housing & Utilities Household Goods/Furniture 1.0887 5.3456 2.0813
Housing & Utilities Household Maintenance 4.1101 5.8762 14.1559
Apparel All Apparel 6.1443 8.7016 7.8026
Apparel Mens Clothng 1.7022 2.9283 1.5850
Apparel Womens Clothing 2.0195 3.0038 2.4739
Apparel Infant Clothing 0.6881 0.5074 0.7567
Apparel Footwear 1.2561 1.8681 2.5288
Apparel Accessories 0.4783 0.3942 0.4582
Transportation All Transportation 22.2282 7.9752 10.3137
Transportation Vehicle Purchase 13.8896 0.4586 2.1391
Transportation Vehicle Maintenance 7.2386 5.3267 7.6918
Transportation Public Transport 1.1000 2.1900 0.4827
Medical Care All Medical Care 10.6622 10.8923 9.3760
Medical Care Medical Supplies 1.2291 1.3909 2.3924
Medical Care Medical Services 9.4330 9.5014 6.9836
Recreation Recreation 3.3994 4.0032 2.2680
Education & Communication Education & Communication 5.6292 5.7111 2.9257
Education & Communication Education 0.6395 0.6188 0.4815
Education & Communication Communication 4.9897 5.0923 2.4442
Other Goods & Services All Other Goods & Services 3.0656 7.3237 8.1944
Other Goods & Services Cigarettes & BetelNut 1.7380 2.6558 4.1746
Other Goods & Services Other Goods 0.5353 0.4458 0.3478
Other Goods & Services Other Services 0.7923 4.2221 3.6719