Year	Percent
2005-01-01	75.075
2006-01-01	75.975
2007-01-01	76.450
2008-01-01	77.200
2009-01-01	77.625
2010-01-01	78.100
2011-01-01	78.350
2012-01-01	79.050
2013-01-01	79.275
2014-01-01	79.300
2015-01-01	79.275
2016-01-01	79.575
2017-01-01	79.575