Year	Percent
2005-01-01	48.475
2006-01-01	49.500
2007-01-01	50.550
2008-01-01	51.250
2009-01-01	50.825
2010-01-01	50.725
2011-01-01	51.025
2012-01-01	50.950
2013-01-01	50.850
2014-01-01	51.225
2015-01-01	51.750
2016-01-01	52.575
2017-01-01	53.275