Year	Percent
2000-01-01	62.375
2001-01-01	63.975
2002-01-01	64.725
2003-01-01	64.825
2004-01-01	65.825
2005-01-01	67.350
2006-01-01	67.975
2007-01-01	69.200
2008-01-01	68.950
2009-01-01	66.475
2010-01-01	65.150
2011-01-01	64.225
2012-01-01	64.375
2013-01-01	65.650
2014-01-01	66.850
2015-01-01	68.375
2016-01-01	69.475
2017-01-01	71.650