In 2007, 12.1% of U.S. wage & salary workers were members of these, down from 20% in 1983
The wages of middle-wage workers were totally flat or in decline ..... 
Down 14% since 2000 7% 1990 1995 2000 2005 2010 0 20 40 60... [DOC] [TLE] Labor unions in the United States - Wikipedia [PAR] Labor unions are legally recognized as representatives of workers in many 
industries in the United States.