Year	Percent
2003-01-01	65.800
2004-01-01	65.650
2005-01-01	65.800
2006-01-01	65.850
2007-01-01	65.100
2008-01-01	65.275
2009-01-01	63.825
2010-01-01	64.850
2011-01-01	65.500
2012-01-01	66.000
2013-01-01	66.075
2014-01-01	66.825
2015-01-01	66.125
2016-01-01	65.925
2017-01-01	66.600