The series comes from the 'Current Population Survey (Household Survey)'
The source code is: LNU02048984
Source: US. Bureau of Labor Statistics
Release: Employment Situation
US. Bureau of Labor Statistics, Employment Level: Total wage and salary, incorporated self employed [LNU02048984], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/LNU02048984/, July 6, 2015.