Year	Percent
2005-01-01	48.050
2006-01-01	48.575
2007-01-01	49.025
2008-01-01	49.525
2009-01-01	49.775
2010-01-01	49.850
2011-01-01	50.075
2012-01-01	50.525
2013-01-01	50.700
2014-01-01	50.725
2015-01-01	50.750
2016-01-01	51.100
2017-01-01	51.250