Source: U.S. Bureau of Labor Statistics
Release: Employment Situation
The series comes from the 'Current Population Survey (Household Survey)'
The source code is: LNS12032192
U.S. Bureau of Labor Statistics, Employment Level: Nonagriculture, Self-employed Workers, Unincorporated [LNS12032192], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/LNS12032192, April 26, 2018.