"Annual data on the labor force, employment, and unemployment in states and substate areas are available from two major sources: the Current Population Survey (CPS) and the Local Area Unemployment Statistics (LAUS) program. The CPS is a sample survey of about 60,000 households nationwide conducted for the U.S. Bureau of Labor Statistics (BLS) by the Census Bureau. The LAUS program is a Federal-State cooperative endeavor in which State workforce agencies prepare estimates using concepts, definitions, and estimation procedures prescribed by BLS. This bulletin presents 2011 annual averages from the CPS for census regions and divisions; the 50 states and the District of Columbia; and 54 large metropolitan areas, 22 metropolitan divisions, and 41 principal cities. Data from the CPS differ from the official estimates produced by the individual States through the LAUS program. CPS estimates are provided herein because they are a current source of information on the demographic and economic characteristics of the labor force in subnational areas, from the same source as the official labor force data for the United States as a whole."