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In 2003, foreign-born workers made up about 14 percent of the U.S. civilian labor force age 16 and over.
Nearly 30 percent of the foreign-born labor force 25 years old and over had not completed high school, compared with only about 7 percent of the native-born labor force. About equal proportions of both the foreign and native born had a college degree (31 and 32 percent, respectively).
These data are from the Current Population Survey. Find more information in "Labor Force Characteristics of Foreign-born Workers in 2003" (PDF) (TXT), news release USDL 04-2402.
Bureau of Labor Statistics, U.S. Department of Labor, The Economics Daily, Educational attainment of foreign-born workers, 2003 at https://www.bls.gov/opub/ted/2004/nov/wk5/art04.htm (visited May 30, 2023).