Year	Percent
2003-01-01	66.500
2004-01-01	70.400
2005-01-01	72.200
2006-01-01	73.800
2007-01-01	74.700
2008-01-01	72.950
2009-01-01	75.275
2010-01-01	76.400
2011-01-01	77.125
2012-01-01	79.175
2013-01-01	80.525
2014-01-01	80.950
2015-01-01	81.325
2016-01-01	81.025
2017-01-01	84.000