Year Percent 2005-01-01 100.0000 2006-01-01 100.0000 2007-01-01 83.1156 2008-01-01 83.4462 2009-01-01 94.3503 2010-01-01 91.0961 2011-01-01 76.7857 2012-01-01 67.7264 2013-01-01 64.8633 2014-01-01 60.8193 2015-01-01 49.8399 2016-01-01 37.6324