Year	Percent
1996-01-01	87.1347
1997-01-01	94.5099
1998-01-01	94.3631
1999-01-01	95.0042
2000-01-01	94.3233
2001-01-01	92.8022
2002-01-01	96.2060
2003-01-01	95.9100
2004-01-01	97.0166
2005-01-01	96.5992
2006-01-01	96.2131
2007-01-01	96.8610
2008-01-01	97.0538
2009-01-01	96.0526
2010-01-01	95.8004
2011-01-01	95.7887
2012-01-01	93.0201
2013-01-01	91.9588
2014-01-01	91.5563
2015-01-01	91.2899
2016-01-01	92.0650