The series comes from the 'Current Population Survey (Household Survey)'
The source code is: LNU04032216
Source: US. Bureau of Labor Statistics
Release: Employment Situation
US. Bureau of Labor Statistics, Unemployment Rate: Management, Business, and Financial Operations Occupations [LNU04032216], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/LNU04032216/, August 2, 2015.