The series comes from the 'Current Population Survey (Household Survey)'
The source code is: LNU04000006
Source: US. Bureau of Labor Statistics
Release: Employment Situation
US. Bureau of Labor Statistics, Unemployment Rate: Black or African American [LNU04000006], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/LNU04000006/, August 2, 2015.