Year	Percent
1995-01-01	64.9157360875000
1996-01-01	65.9566170075000
1997-01-01	66.1830538950000
1998-01-01	66.7253982225000
1999-01-01	67.4975825725000
2000-01-01	67.6168927475000
2001-01-01	68.2448123650000
2002-01-01	70.2654240075000
2003-01-01	70.7461583425000
2004-01-01	70.2693048400000
2005-01-01	69.5714737075000
2006-01-01	69.5051881200000
2007-01-01	69.2801033850000
2008-01-01	69.9252383850000
2009-01-01	70.8537729400000
2010-01-01	71.0601447650000
2011-01-01	71.9619560850000
2012-01-01	49.6250000000000
2013-01-01	49.0166666666667
2014-01-01	49.1500000000000
2015-01-01	50.1083333333333
2016-01-01	51.0333333333333
2017-01-01	51.4583333333333