Year	Percent
1995-01-01	50.0546375450000
1996-01-01	49.2455548875000
1997-01-01	47.9700197275000
1998-01-01	48.3677060525000
1999-01-01	49.2508124825000
2000-01-01	50.0575477100000
2001-01-01	51.5443358975000
2002-01-01	52.5958223425000
2003-01-01	53.9964892150000
2004-01-01	55.7641392925000
2005-01-01	56.5282763025000
2006-01-01	58.6700568200000
2007-01-01	60.3707998700000
2008-01-01	61.1717332200000
2009-01-01	62.1122241050000
2010-01-01	62.8484482925000
2011-01-01	63.9458589650000
2012-01-01	66.2916666666666
2013-01-01	67.6250000000000
2014-01-01	67.9000000000000
2015-01-01	68.9500000000000
2016-01-01	69.1666666666667
2017-01-01	69.1333333333334