Year	Percent
2006-01-01	70.500
2007-01-01	70.525
2008-01-01	71.050
2009-01-01	71.400
2010-01-01	71.925
2011-01-01	72.950
2012-01-01	72.350
2013-01-01	72.900
2014-01-01	73.625
2015-01-01	73.925
2016-01-01	74.400
2017-01-01	74.750