Year Percent 1996-01-01 57.7087 1997-01-01 64.8258 1998-01-01 61.5150 1999-01-01 53.8584 2000-01-01 75.8027 2001-01-01 89.3702 2002-01-01 90.7671 2003-01-01 98.4242 2004-01-01 100.0000 2005-01-01 100.0000 2006-01-01 89.0051 2007-01-01 100.0000 2008-01-01 82.3496 2009-01-01 81.9988 2010-01-01 100.0000 2011-01-01 68.4805 2012-01-01 62.2635 2013-01-01 62.5921 2014-01-01 64.6613 2015-01-01 69.0775 2016-01-01 69.6017