Year	Percent
2006-01-01	73.325
2007-01-01	73.425
2008-01-01	73.825
2009-01-01	74.025
2010-01-01	74.550
2011-01-01	75.625
2012-01-01	75.000
2013-01-01	75.575
2014-01-01	76.525
2015-01-01	77.025
2016-01-01	77.575
2017-01-01	78.175