http://www.npr.org/templates/story/story.php?storyId=103171928

Labor Underutilization Problems of U.S. Workers Across Household Income Groups at the End of the Great Recession: A Truly Great Depression Among the Nation’s Low Income Workers Amidst Full Employment Among the Most Affluent wrote:
The unemployment rates of workers in the fourth quarter of calendar year 2009 varied extremely widely across the ten household income deciles.8 Workers in the lowest income decile faced a Great Depression type unemployment rate of nearly 31% while those in the second lowest income decile had an unemployment rate slightly below 20% (Table 3 and Chart 2). Unemployment rates fell steadily and steeply across the ten income deciles. Workers in the top two deciles of the income distribution faced unemployment rates of only 4.0 and 3.2 percent respectively, the equivalent of full employment. The relative size of the gap in unemployment rates between workers in the bottom and top income deciles was close to ten to one. Clearly, these two groups of workers occupy radically different types of labor markets in the U.S.

Source: http://www.clms.neu.edu/publication/documents/Labor_Underutilization_Problems_of_U.pdf