Year	Percent
2000-01-01	73.650
2001-01-01	73.575
2002-01-01	73.675
2003-01-01	72.550
2004-01-01	72.250
2005-01-01	71.750
2006-01-01	72.250
2007-01-01	73.975
2008-01-01	75.375
2009-01-01	74.400
2010-01-01	73.250
2011-01-01	73.375
2012-01-01	73.750
2013-01-01	73.475
2014-01-01	73.350
2015-01-01	72.950
2016-01-01	72.825
2017-01-01	72.400