Year	Percent
2003-01-01	74.925
2004-01-01	73.500
2005-01-01	75.150
2006-01-01	75.375
2007-01-01	76.000
2008-01-01	75.025
2009-01-01	72.075
2010-01-01	71.600
2011-01-01	71.675
2012-01-01	72.700
2013-01-01	73.700
2014-01-01	74.875
2015-01-01	76.425
2016-01-01	77.325
2017-01-01	76.750