Year	Percent
2005-01-01	77.300
2006-01-01	77.575
2007-01-01	77.600
2008-01-01	77.850
2009-01-01	77.625
2010-01-01	77.625
2011-01-01	77.475
2012-01-01	77.825
2013-01-01	77.975
2014-01-01	78.100
2015-01-01	78.275
2016-01-01	78.525
2017-01-01	78.850