Year	Percent
1996-01-01	83.4887
1997-01-01	72.3271
1998-01-01	64.1600
1999-01-01	52.9946
2000-01-01	59.5689
2001-01-01	76.3219
2002-01-01	89.9486
2003-01-01	83.8036
2004-01-01	86.1834
2005-01-01	81.9281
2006-01-01	82.9114
2007-01-01	86.1103
2008-01-01	86.5025
2009-01-01	82.7725
2010-01-01	85.2013
2011-01-01	89.5253
2012-01-01	93.8846
2013-01-01	94.3251
2014-01-01	97.4145
2015-01-01	81.0413
2016-01-01	81.2549