Year Percent 2002-01-01 90.03390000000000 2003-01-01 90.24950000000000 2004-01-01 88.93680000000000 2005-01-01 87.93590000000000 2006-01-01 85.76760000000000 2007-01-01 93.62840000000000 2008-01-01 93.22470000000000 2009-01-01 88.89410000000000 2010-01-01 89.99470000000000 2011-01-01 81.22060000000000 2012-01-01 87.97070000000000 2013-01-01 84.12200000000001 2014-01-01 100.00000000000000 2015-01-01 71.46800000000000 2016-01-01 73.31440000000000