Year	Percent
2005-01-01	65.450
2006-01-01	67.150
2007-01-01	68.975
2008-01-01	70.100
2009-01-01	70.325
2010-01-01	71.250
2011-01-01	72.700
2012-01-01	73.000
2013-01-01	73.500
2014-01-01	73.775
2015-01-01	73.975
2016-01-01	74.650
2017-01-01	75.250