Year Percent 2003-01-01 49.03881 2004-01-01 63.88475 2005-01-01 70.46864 2006-01-01 74.67841 2007-01-01 74.64012 2008-01-01 68.51234 2009-01-01 80.69006 2010-01-01 71.63431