Year	Percent
2003-01-01	78.800
2004-01-01	77.400
2005-01-01	74.900
2006-01-01	71.500
2007-01-01	70.875
2008-01-01	69.725
2009-01-01	69.400
2010-01-01	68.025
2011-01-01	67.900
2012-01-01	64.775
2013-01-01	65.800
2014-01-01	63.475
2015-01-01	64.975
2016-01-01	66.125
2017-01-01	64.900