Year	Percent
2005-01-01	50.950
2006-01-01	50.500
2007-01-01	50.325
2008-01-01	49.975
2009-01-01	49.700
2010-01-01	49.650
2011-01-01	49.450
2012-01-01	49.075
2013-01-01	48.900
2014-01-01	48.725
2015-01-01	48.700
2016-01-01	48.450
2017-01-01	48.175