Year	Percent
2005-01-01	62.900
2006-01-01	63.700
2007-01-01	63.900
2008-01-01	65.700
2009-01-01	65.700
2010-01-01	63.650
2011-01-01	64.625
2012-01-01	64.950
2013-01-01	65.175
2014-01-01	65.925
2015-01-01	66.350
2016-01-01	66.975
2017-01-01	66.700