Year	Percent
1996-01-01	88.59750000000000
1997-01-01	88.35300000000000
1998-01-01	88.14399999999999
1999-01-01	87.80220000000000
2000-01-01	87.82230000000000
2001-01-01	91.86780000000000
2002-01-01	92.35370000000000
2003-01-01	92.23280000000000
2004-01-01	90.81800000000000
2005-01-01	88.69660000000000
2006-01-01	87.29960000000000
2007-01-01	87.74190000000000
2008-01-01	89.00100000000000
2009-01-01	88.63980000000000
2010-01-01	90.30690000000000
2011-01-01	91.17520000000000
2012-01-01	91.14490000000000
2013-01-01	91.14160000000000
2014-01-01	91.56480000000000
2015-01-01	91.82340000000000
2016-01-01	94.43420000000000