Year Percent 2000-01-01 38.4000 2001-01-01 39.2000 2002-01-01 37.0000 2003-01-01 22.3000 2004-01-01 21.1000 2005-01-01 8.5000 2006-01-01 7.0000 2007-01-01 7.0000 2008-01-01 64.4000 2009-01-01 65.1000 2010-01-01 66.6323 2011-01-01 68.2936 2012-01-01 64.8774 2013-01-01 61.7263 2014-01-01 64.0354 2015-01-01 64.6075 2016-01-01 72.6758