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The Current Population Survey (CPS) provides labor force estimates for various demographic groups at the national and state levels. It is a monthly survey of about 50,000 housing units that is conducted by the U.S. Bureau of Census (BOC) for the U.S. Bureau of Labor Statistics (BLS). It is also the vehicle for supplements collecting national information on income, poverty, and other topics. The CPS sampling frame is based on the list of addresses for the decennial census, updated for new construction.Additionally, data from the census are used in CPS stratification and estimation.