Year Dollars per Hour 2001-01-01 6.29 2002-01-01 6.32 2003-01-01 6.56 2004-01-01 6.31 2005-01-01 6.77 2006-01-01 7.26 2007-01-01 7.26 2008-01-01 7.46 2009-01-01 7.85 2010-01-01 8.20 2011-01-01 8.31 2012-01-01 8.53