Year	Percent
2005-01-01	71.250
2006-01-01	72.775
2007-01-01	74.650
2008-01-01	75.850
2009-01-01	75.400
2010-01-01	76.250
2011-01-01	77.600
2012-01-01	77.900
2013-01-01	77.950
2014-01-01	78.050
2015-01-01	77.975
2016-01-01	78.425
2017-01-01	78.900