Year	Percent
1995-01-01	54.0564218350000
1996-01-01	53.6539639925000
1997-01-01	53.5187523150000
1998-01-01	53.4033031575000
1999-01-01	53.8020759800000
2000-01-01	54.2700834725000
2001-01-01	54.2665759925000
2002-01-01	54.1124190800000
2003-01-01	54.4660127950000
2004-01-01	54.9332097050000
2005-01-01	55.2037041350000
2006-01-01	55.6030139975000
2007-01-01	56.2730192950000
2008-01-01	56.5080799075000
2009-01-01	56.9181778375000
2010-01-01	57.3368285475000
2011-01-01	57.3727601550000
2012-01-01	63.5666666666667
2013-01-01	63.7000000000000
2014-01-01	64.2083333333333
2015-01-01	64.0750000000000
2016-01-01	64.1333333333333
2017-01-01	64.0166666666667