Year Percent 2003-01-01 87.500000000000000 2004-01-01 64.516100000000000 2005-01-01 60.975600000000000 2006-01-01 51.111100000000000 2007-01-01 42.616000000000010 2008-01-01 47.404800000000000 2009-01-01 29.368700000000000 2010-01-01 50.725100000000000 2011-01-01 56.428999999999995 2012-01-01 55.538000000000004 2013-01-01 59.017200000000000 2014-01-01 42.951800000000000