Year	Percent
2005-01-01	65.800
2006-01-01	64.250
2007-01-01	62.750
2008-01-01	61.750
2009-01-01	60.025
2010-01-01	58.950
2011-01-01	57.025
2012-01-01	54.700
2013-01-01	52.675
2014-01-01	50.550
2015-01-01	48.875
2016-01-01	46.900
2017-01-01	45.150