Year Percent 2000-01-01 66.7000 2001-01-01 66.8000 2002-01-01 62.8000 2003-01-01 73.0000 2004-01-01 83.4000 2005-01-01 78.0000 2006-01-01 78.0000 2007-01-01 44.6000 2008-01-01 73.4000 2009-01-01 59.0000 2010-01-01 61.5056 2011-01-01 54.5814 2012-01-01 53.7149 2013-01-01 55.9566 2014-01-01 64.0210 2015-01-01 68.1034 2016-01-01 68.9922