*Implementation of new March CPS processing system.
1CPS data from 1983 to 1992 are weighted based on the 1980 decennial census.
2Beginning in 1993 CPS data weighted based on the 1990 decennial census.
Source: Current Population Survey, Bureau of the Census
Note: The annual data come from two sources: for years 1983 to 1993, the source is the March demographic supplement of the Current Population Survey; and for years 1994 and later, the data are the average of the 12 monthly Current Population Surveys/Housing Vacancy Surveys. For the quarterly data, the source is the corresponding three monthly Current Population Surveys/Housing Vacancy Surveys.
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