Year	Percent
2000-01-01	63.375
2001-01-01	64.200
2002-01-01	64.625
2003-01-01	66.250
2004-01-01	65.675
2005-01-01	66.725
2006-01-01	71.400
2007-01-01	73.475
2008-01-01	73.725
2009-01-01	64.350
2010-01-01	61.700
2011-01-01	67.775
2012-01-01	69.675
2013-01-01	71.350
2014-01-01	72.950
2015-01-01	75.325
2016-01-01	75.675
2017-01-01	77.400