Year	Percent
2003-01-01	70.300
2004-01-01	73.600
2005-01-01	74.500
2006-01-01	75.000
2007-01-01	77.700
2008-01-01	72.875
2009-01-01	70.600
2010-01-01	77.350
2011-01-01	76.625
2012-01-01	75.375
2013-01-01	78.225
2014-01-01	77.000
2015-01-01	65.850
2016-01-01	68.950
2017-01-01	71.725