Year	Percent
1996-01-01	83.2584
1997-01-01	86.5413
1998-01-01	88.5125
1999-01-01	88.3175
2000-01-01	86.2779
2001-01-01	88.5234
2002-01-01	89.7765
2003-01-01	92.3086
2004-01-01	91.0705
2005-01-01	91.7773
2006-01-01	92.7265
2007-01-01	93.1887
2008-01-01	91.8919
2009-01-01	91.1636
2010-01-01	89.7218
2011-01-01	90.3150
2012-01-01	81.9430
2013-01-01	86.5572
2014-01-01	87.2975
2015-01-01	75.5711
2016-01-01	64.0925