Year	Percent
2005-01-01	69.800
2006-01-01	70.000
2007-01-01	70.150
2008-01-01	70.300
2009-01-01	69.975
2010-01-01	69.750
2011-01-01	69.675
2012-01-01	69.850
2013-01-01	69.650
2014-01-01	69.475
2015-01-01	69.475
2016-01-01	69.700
2017-01-01	69.775