Source: US. Bureau of Labor Statistics
Release: Employment Situation
The series comes from the 'Current Population Survey (Household Survey)'
The source code is: LNS13000093
US. Bureau of Labor Statistics, Unemployment Level: 45 to 54 years [LNS13000093], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/LNS13000093, December 10, 2016.