Year Percent 2005-01-01 27.7078 2006-01-01 27.6932 2007-01-01 42.7930 2008-01-01 61.0122 2009-01-01 46.6671 2010-01-01 53.4294 2011-01-01 71.1756 2012-01-01 61.6178 2013-01-01 59.7767 2014-01-01 44.7475 2015-01-01 44.7286 2016-01-01 40.4627