Year	Percent
2000-01-01	71.425
2001-01-01	70.750
2002-01-01	70.700
2003-01-01	71.525
2004-01-01	70.975
2005-01-01	70.775
2006-01-01	73.100
2007-01-01	73.850
2008-01-01	74.150
2009-01-01	72.775
2010-01-01	72.200
2011-01-01	72.925
2012-01-01	74.750
2013-01-01	74.900
2014-01-01	75.825
2015-01-01	75.575
2016-01-01	75.725
2017-01-01	75.000