Year	Percent
2003-01-01	66.300
2004-01-01	67.025
2005-01-01	73.350
2006-01-01	74.125
2007-01-01	74.500
2008-01-01	73.500
2009-01-01	66.500
2010-01-01	65.350
2011-01-01	66.550
2012-01-01	68.375
2013-01-01	75.125
2014-01-01	73.600
2015-01-01	76.500
2016-01-01	78.150
2017-01-01	76.525