Year	Percent
2000-01-01	72.950
2001-01-01	74.125
2002-01-01	74.400
2003-01-01	73.650
2004-01-01	73.125
2005-01-01	73.225
2006-01-01	74.350
2007-01-01	75.975
2008-01-01	77.175
2009-01-01	76.975
2010-01-01	74.675
2011-01-01	74.175
2012-01-01	74.350
2013-01-01	73.575
2014-01-01	73.125
2015-01-01	74.150
2016-01-01	74.825
2017-01-01	75.850