Year	Percent
1995-01-01	60.4333425725000
1996-01-01	61.0180706675000
1997-01-01	60.7437273500000
1998-01-01	61.2700919050000
1999-01-01	62.4312330000000
2000-01-01	63.0275538925000
2001-01-01	62.4046247650000
2002-01-01	62.8081779200000
2003-01-01	62.9465282400000
2004-01-01	63.2985185075000
2005-01-01	64.8354161275000
2006-01-01	65.6561652700000
2007-01-01	67.1203962325000
2008-01-01	68.2741592975000
2009-01-01	68.1543019225000
2010-01-01	69.3442988425000
2011-01-01	70.2400143500000
2012-01-01	72.1166666666666
2013-01-01	72.4916666666667
2014-01-01	74.3166666666666
2015-01-01	74.2500000000000
2016-01-01	75.0666666666666
2017-01-01	75.7416666666666