Year	Percent
1995-01-01	56.5143325025000
1996-01-01	56.3624691025000
1997-01-01	55.7026314100000
1998-01-01	55.2322382725000
1999-01-01	55.4690709425000
2000-01-01	56.0754844775000
2001-01-01	55.5651109175000
2002-01-01	54.8078246125000
2003-01-01	54.9793153050000
2004-01-01	55.6702039250000
2005-01-01	56.7081446875000
2006-01-01	57.5573203500000
2007-01-01	58.9443189850000
2008-01-01	59.8273659325000
2009-01-01	59.2132377425000
2010-01-01	60.1636050425000
2011-01-01	60.8787355100000
2012-01-01	66.5000000000000
2013-01-01	67.0583333333333
2014-01-01	67.8666666666666
2015-01-01	68.3166666666667
2016-01-01	68.5750000000000
2017-01-01	69.0250000000000