Year	Percent
2000-01-01	73.250
2001-01-01	73.500
2002-01-01	73.725
2003-01-01	73.100
2004-01-01	72.950
2005-01-01	72.625
2006-01-01	72.775
2007-01-01	73.200
2008-01-01	73.400
2009-01-01	73.300
2010-01-01	71.475
2011-01-01	70.475
2012-01-01	70.875
2013-01-01	70.800
2014-01-01	70.500
2015-01-01	70.150
2016-01-01	69.650
2017-01-01	69.375