Year	Percent
2003-01-01	73.425
2004-01-01	73.725
2005-01-01	74.050
2006-01-01	74.775
2007-01-01	76.050
2008-01-01	77.225
2009-01-01	76.650
2010-01-01	76.750
2011-01-01	76.250
2012-01-01	76.050
2013-01-01	76.175
2014-01-01	75.400
2015-01-01	75.225
2016-01-01	75.325
2017-01-01	75.175