Year Percent 2001-01-01 85.1000 2002-01-01 65.8000 2003-01-01 68.0000 2004-01-01 70.8000 2005-01-01 71.5000 2006-01-01 75.6000 2007-01-01 76.4000 2008-01-01 62.4000 2009-01-01 73.8000 2010-01-01 70.8294 2011-01-01 71.4258 2012-01-01 74.2773 2013-01-01 78.4300 2014-01-01 63.2476 2015-01-01 61.1228 2016-01-01 60.4857