Year Percent 2006-01-01 40.8782 2007-01-01 68.0053 2008-01-01 46.8133 2009-01-01 58.1111 2010-01-01 66.5098 2011-01-01 60.1097 2012-01-01 81.4396 2013-01-01 63.7029 2014-01-01 53.3351 2015-01-01 61.5402 2016-01-01 59.5655