Source: U.S. Bureau of Labor Statistics
Release: Employment Situation
The civilian labor force is the sum of employed and unemployed persons. Those persons not classified as employed or unemployed are not in the labor force.
U.S. Bureau of Labor Statistics, Civilian Labor Force: College Graduates: Advanced Degree: Master's Degree and Higher, 65 years and over, Men [CGADLM65O], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/CGADLM65O, September 25, 2018.