Year	Percent
2005-01-01	75.625
2006-01-01	76.350
2007-01-01	76.650
2008-01-01	77.275
2009-01-01	77.675
2010-01-01	78.175
2011-01-01	78.400
2012-01-01	79.025
2013-01-01	79.225
2014-01-01	79.475
2015-01-01	79.450
2016-01-01	79.550
2017-01-01	79.750