Year	Percent
2005-01-01	61.250
2006-01-01	63.675
2007-01-01	65.800
2008-01-01	67.200
2009-01-01	69.250
2010-01-01	70.825
2011-01-01	71.800
2012-01-01	73.075
2013-01-01	74.475
2014-01-01	75.500
2015-01-01	75.250
2016-01-01	76.875
2017-01-01	77.875