Year	Percent
2000-01-01	61.925
2001-01-01	59.475
2002-01-01	60.500
2003-01-01	60.775
2004-01-01	57.975
2005-01-01	60.525
2006-01-01	61.450
2007-01-01	63.375
2008-01-01	68.275
2009-01-01	67.250
2010-01-01	64.325
2011-01-01	67.050
2012-01-01	65.325
2013-01-01	66.900
2014-01-01	69.150
2015-01-01	67.750
2016-01-01	70.400
2017-01-01	71.975