Source: US. Bureau of Labor Statistics
Release: Employment Situation
The series comes from the 'Current Population Survey (Household Survey)'
The source code is: LNU01324230
US. Bureau of Labor Statistics, Civilian Labor Force Participation Rate: 55 years and over [LNU01324230], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/LNU01324230, August 30, 2016.