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In 2006, foreign-born workers made up 15.3 percent of the U.S. civilian labor force, up from 14.8 percent in 2005.
By region, the foreign born comprised 24.0 percent of the total labor force in the West, 17.9 percent in the Northeast, and 13.5 percent in the South. By comparison, only 7.3 percent of the total labor force in the Midwest was foreign born.
These data are from the Current Population Survey. To learn more, see "Foreign-Born Workers: Labor Force Characteristics in 2006" (PDF) (TXT), news release USDL 07-0603.
Bureau of Labor Statistics, U.S. Department of Labor, The Economics Daily, Foreign-born workers by region, 2006 at https://www.bls.gov/opub/ted/2007/apr/wk5/art04.htm (visited May 31, 2023).