Source: U.S. Bureau of Labor Statistics
Release: Employment Situation
The series comes from the 'Current Population Survey (Household Survey)'
The source code is: LNU02027714
U.S. Bureau of Labor Statistics, Employment Level: All industries Self-employed, unincorporated [LNU02027714], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/LNU02027714, April 25, 2019.