Year	Percent
2005-01-01	69.900
2006-01-01	70.400
2007-01-01	70.800
2008-01-01	71.225
2009-01-01	71.325
2010-01-01	71.325
2011-01-01	71.450
2012-01-01	71.975
2013-01-01	72.175
2014-01-01	72.325
2015-01-01	72.475
2016-01-01	72.825
2017-01-01	73.075