Year Percent 2000-01-01 100.0000 2001-01-01 100.0000 2002-01-01 100.0000 2003-01-01 100.0000 2004-01-01 100.0000 2005-01-01 100.0000 2006-01-01 100.0000 2007-01-01 98.5375 2008-01-01 95.8409 2009-01-01 93.6005 2010-01-01 94.9216 2011-01-01 92.8643 2012-01-01 91.3717 2013-01-01 91.2469 2014-01-01 90.3342 2015-01-01 91.0473 2016-01-01 89.2963