> > Archived Consumer Price Index Supplemental Files Supplemental files for the current year are available individually by month. Supplemental files for previous years are available in a compressed file for each year. Caution: Data in archived CPI Supplemental files may have been revised in subsequent editions. In particular, seasonally adjusted indexes and percent changes are revised with the release of January data each year for the preceding five years.
A graph of the from 1913 (in blue), and its percentage annual change (in red) A consumer price index ( CPI) measures changes in the price level of of and purchased by households. The CPI is a statistical estimate constructed using the prices of a sample of representative items whose prices are collected periodically. Sub-indices and sub-sub-indices are computed for different categories and sub-categories of goods and services, being combined to produce the overall index with weights reflecting their shares in the total of the covered by the index. It is one of several calculated by most national statistical agencies.
The annual percentage change in a CPI is used as a measure of. A CPI can be used to index (i.e. Adjust for the effect of inflation) the real value of wages, salaries,, for regulating prices and for deflating monetary magnitudes to show changes in real values. In most countries, the CPI, along with the population, is one of the most closely watched national economic statistics. See also: Leaving aside the quality of public services, the environment, crime and so forth, and regarding the standard of living as a function of the level and composition of individuals' consumption, this standard depends upon the amount and range of goods and services they consume.