The series comes from the 'Current Population Survey (Household Survey)'
The source code is: LNS14024231
Source: US. Bureau of Labor Statistics
Release: Employment Situation
US. Bureau of Labor Statistics, Unemployment Rate: 55 years and over, Men [LNS14024231], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/LNS14024231/, September 1, 2015.