The series comes from the 'Current Population Survey (Household Survey)'
The source code is: LNU03000028
Source: US. Bureau of Labor Statistics
Release: Employment Situation
US. Bureau of Labor Statistics, Unemployment Level: 20 years and over, White Men [LNU03000028], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/LNU03000028/, July 31, 2015.