Year Percent 2005-01-01 29.8252 2006-01-01 32.3279 2007-01-01 31.7077 2008-01-01 35.2386 2009-01-01 37.3649 2010-01-01 17.5411 2011-01-01 12.2951 2012-01-01 11.3559 2013-01-01 10.0926 2014-01-01 18.3187 2015-01-01 24.0876 2016-01-01 14.2446