FILE - In this Wednesday, June, 15, 2011, file photo, job seekers wait in a line at a job fair in Southfield, Mich. In the United States, half of the 7.5 million jobs lost during the Great Recession were paid middle-class wages, ranging from $37,000 to $68,000. But only 2 percent of the 3.4 million jobs gained since the recession are mid-pay. (AP Photo/Paul Sancya, File)

Associated Press
FILE - In this Wednesday, June, 15, 2011, file photo, job seekers wait in a line at a job fair in Southfield, Mich. In the United States, half of the 7.5 million jobs lost during the Great Recession were paid middle-class wages, ranging from $37,000 to $68,000. But only 2 percent of the 3.4 million jobs gained since the recession are mid-pay. (AP Photo/Paul Sancya, File)
FILE - In this Wednesday, June, 15, 2011, file photo, job seekers wait in a line at a job fair in Southfield, Mich. In the United States, half of the 7.5 million jobs lost during the Great Recession were paid middle-class wages, ranging from $37,000 to $68,000. But only 2 percent of the 3.4 million jobs gained since the recession are mid-pay. (AP Photo/Paul Sancya, File)
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