Year Percent 2005-01-01 43.2000 2006-01-01 40.0000 2007-01-01 42.7000 2008-01-01 73.2000 2009-01-01 47.4000 2010-01-01 62.8995 2011-01-01 73.3504 2012-01-01 73.3112 2013-01-01 75.1960 2014-01-01 71.1504 2015-01-01 80.0152 2016-01-01 68.8686