Year	Percent
1996-01-01	90.78960000000000
1997-01-01	91.36630000000000
1998-01-01	90.74830000000000
1999-01-01	93.55810000000000
2000-01-01	90.22350000000000
2001-01-01	92.86940000000000
2002-01-01	91.86550000000000
2003-01-01	87.47300000000000
2004-01-01	90.90130000000000
2005-01-01	91.16680000000000
2006-01-01	81.04899999999999
2007-01-01	90.81920000000000
2008-01-01	91.03910000000000
2009-01-01	89.41970000000000
2010-01-01	87.50370000000000
2011-01-01	87.56280000000000
2012-01-01	86.71660000000000
2013-01-01	86.12840000000000
2014-01-01	89.53690000000000
2015-01-01	90.79030000000000
2016-01-01	91.37600000000000