Year Percent 2000-01-01 40.5000 2001-01-01 40.5000 2002-01-01 56.3000 2003-01-01 53.4000 2004-01-01 61.3000 2005-01-01 61.6000 2006-01-01 68.5000 2007-01-01 67.3000 2008-01-01 68.8000 2009-01-01 61.6000 2010-01-01 72.4584 2011-01-01 71.8393 2012-01-01 68.2314 2013-01-01 67.8099 2014-01-01 69.3045 2015-01-01 70.1218 2016-01-01 70.2005