Year Dollars per Hour 2001-01-01 8.85 2002-01-01 9.23 2003-01-01 9.47 2004-01-01 10.27 2005-01-01 10.25 2006-01-01 10.82 2007-01-01 10.41 2008-01-01 11.55 2009-01-01 11.95 2010-01-01 12.85 2011-01-01 12.86 2012-01-01 12.30