Year	Percent
1996-01-01	93.00010000000000
1997-01-01	87.06400000000000
1998-01-01	85.82680000000000
1999-01-01	87.00640000000000
2000-01-01	85.09260000000000
2001-01-01	87.86100000000000
2002-01-01	85.56810000000000
2003-01-01	88.93530000000000
2004-01-01	85.30180000000000
2005-01-01	92.89780000000000
2006-01-01	81.18480000000000
2007-01-01	70.74190000000000
2008-01-01	62.94850000000000
2009-01-01	68.68340000000000
2010-01-01	71.35910000000000
2011-01-01	72.74450000000000
2012-01-01	84.34700000000001
2013-01-01	83.75460000000000
2014-01-01	85.63360000000000
2015-01-01	80.47410000000000
2016-01-01	77.87960000000000