Year	Percent
1995-01-01	65.0277642275000
1996-01-01	65.2913512175000
1997-01-01	65.7688728600000
1998-01-01	66.5712650225000
1999-01-01	67.9771153100000
2000-01-01	68.4948172250000
2001-01-01	68.3291408325000
2002-01-01	69.2565905975000
2003-01-01	69.9148440300000
2004-01-01	70.3544909875000
2005-01-01	70.7140271025000
2006-01-01	70.9744196875000
2007-01-01	72.0132683925000
2008-01-01	72.3670414650000
2009-01-01	73.2335154050000
2010-01-01	73.7192501275000
2011-01-01	73.9947462969493
2012-01-01	76.8833333333333
2013-01-01	77.0083333333333
2014-01-01	78.3750000000000
2015-01-01	78.0500000000000
2016-01-01	78.5416666666667
2017-01-01	78.7750000000000