Year	Percent
2000-01-01	74.950
2001-01-01	75.025
2002-01-01	74.450
2003-01-01	74.400
2004-01-01	74.925
2005-01-01	75.625
2006-01-01	76.725
2007-01-01	79.800
2008-01-01	78.575
2009-01-01	75.650
2010-01-01	73.600
2011-01-01	72.675
2012-01-01	72.375
2013-01-01	72.625
2014-01-01	72.675
2015-01-01	73.000
2016-01-01	73.075
2017-01-01	72.675