Year Percent 2005-01-01 100.0000 2006-01-01 97.3211 2007-01-01 89.1844 2008-01-01 92.7161 2009-01-01 73.0637 2010-01-01 59.7381 2011-01-01 66.5181 2012-01-01 63.8239 2013-01-01 57.8009 2014-01-01 63.7336 2015-01-01 53.3791 2016-01-01 51.8292