Source: US. Bureau of Labor Statistics
Release: Employment Situation
The series comes from the 'Current Population Survey (Household Survey)'
The source code is: LNS13000091
US. Bureau of Labor Statistics, Unemployment Level: 35 to 44 years [LNS13000091], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/LNS13000091, July 24, 2016.