Year Percent 2006-01-01 95.6227 2007-01-01 94.5385 2008-01-01 94.7749 2009-01-01 95.2562 2010-01-01 94.1356 2011-01-01 93.6012 2012-01-01 92.1814 2013-01-01 90.8300 2014-01-01 90.9774 2015-01-01 89.9847 2016-01-01 91.7507