Year	Percent
2000-01-01	42.675
2001-01-01	46.225
2002-01-01	50.725
2003-01-01	50.925
2004-01-01	55.000
2005-01-01	57.650
2006-01-01	60.600
2007-01-01	61.225
2008-01-01	62.425
2009-01-01	65.975
2010-01-01	64.250
2011-01-01	63.575
2012-01-01	64.950
2013-01-01	66.475
2014-01-01	66.525
2015-01-01	69.450
2016-01-01	71.400
2017-01-01	72.375