The series comes from the 'Current Population Survey (Household Survey)'
The source code is: LNU01073396
Source: US. Bureau of Labor Statistics
Release: Employment Situation
US. Bureau of Labor Statistics, Civilian Labor Force: Men, Foreign Born [LNU01073396], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/LNU01073396/, June 30, 2015.