Year Percent 2003-01-01 58.4615 2004-01-01 60.9023 2005-01-01 40.8578 2006-01-01 54.4554 2007-01-01 57.3368 2008-01-01 27.3166 2009-01-01 32.8887 2010-01-01 30.5045 2011-01-01 23.6567 2012-01-01 27.3885 2013-01-01 20.3246 2014-01-01 32.0747 2015-01-01 26.1989 2016-01-01 52.6357