Year	Percent
2006-01-01	53.175
2007-01-01	53.100
2008-01-01	52.300
2009-01-01	51.325
2010-01-01	50.175
2011-01-01	48.950
2012-01-01	48.850
2013-01-01	47.925
2014-01-01	47.425
2015-01-01	46.650
2016-01-01	45.800
2017-01-01	45.025