Year	Percent
2000-01-01	71.625
2001-01-01	72.000
2002-01-01	70.900
2003-01-01	70.625
2004-01-01	71.250
2005-01-01	72.150
2006-01-01	73.200
2007-01-01	75.800
2008-01-01	72.600
2009-01-01	64.200
2010-01-01	60.975
2011-01-01	59.775
2012-01-01	59.525
2013-01-01	61.775
2014-01-01	63.400
2015-01-01	65.125
2016-01-01	66.475
2017-01-01	67.525