Year	Percent
2005-01-01	79.100
2006-01-01	80.275
2007-01-01	80.600
2008-01-01	80.500
2009-01-01	80.975
2010-01-01	81.325
2011-01-01	82.150
2012-01-01	82.250
2013-01-01	82.450
2014-01-01	82.475
2015-01-01	82.500
2016-01-01	82.625
2017-01-01	82.525