Year	Percent
2005-01-01	49.650
2006-01-01	50.450
2007-01-01	51.575
2008-01-01	52.175
2009-01-01	51.775
2010-01-01	51.275
2011-01-01	52.400
2012-01-01	50.700
2013-01-01	50.850
2014-01-01	49.925
2015-01-01	48.825
2016-01-01	49.225
2017-01-01	49.850