Year	Percent
1996-01-01	67.1689
1997-01-01	67.9022
1998-01-01	77.2824
1999-01-01	78.3921
2000-01-01	83.5842
2001-01-01	80.8559
2002-01-01	87.5444
2003-01-01	87.1100
2004-01-01	61.1882
2005-01-01	57.8368
2006-01-01	57.0954
2007-01-01	56.7132
2008-01-01	51.3528
2009-01-01	50.4768
2010-01-01	46.5725
2011-01-01	48.7470
2012-01-01	46.9970
2013-01-01	53.5002
2014-01-01	55.6886
2015-01-01	60.1610
2016-01-01	57.3036