The series comes from the 'Current Population Survey (Household Survey)'
The source code is: LNU05026648
Source: US. Bureau of Labor Statistics
Release: Employment Situation
US. Bureau of Labor Statistics, Not in Labor Force: Searched For Work and Available, Reasons Other Than Discouragement [LNU05026648], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/LNU05026648/, July 27, 2015.