Year	Percent
2006-01-01	54.475
2007-01-01	54.450
2008-01-01	53.800
2009-01-01	52.925
2010-01-01	51.875
2011-01-01	50.675
2012-01-01	50.625
2013-01-01	49.725
2014-01-01	49.525
2015-01-01	48.750
2016-01-01	48.025
2017-01-01	47.225