Year Percent 1999-01-01 46.7000 2000-01-01 49.7000 2001-01-01 49.7000 2002-01-01 49.7000 2003-01-01 76.4000 2004-01-01 96.2000 2005-01-01 96.2000 2006-01-01 50.3000 2007-01-01 51.1000 2008-01-01 45.2000 2009-01-01 74.8000 2010-01-01 79.9856 2011-01-01 64.5693 2012-01-01 70.5604 2013-01-01 55.8185 2014-01-01 64.4258 2015-01-01 72.2395 2016-01-01 45.8984