Year	Percent
2006-01-01	72.575
2007-01-01	72.375
2008-01-01	71.200
2009-01-01	69.025
2010-01-01	66.575
2011-01-01	64.750
2012-01-01	63.300
2013-01-01	61.625
2014-01-01	61.250
2015-01-01	59.775
2016-01-01	58.100
2017-01-01	56.300