The series comes from the 'Current Population Survey (Household Survey)'
The source code is: LNU02349587
Source: US. Bureau of Labor Statistics
Release: Employment Situation
US. Bureau of Labor Statistics, Employment-Population Ratio - Men, Veterans, Other Service Periods, 18 years and over [LNU02349587], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/LNU02349587/, June 3, 2015.