Year	Percent
2003-01-01	64.050
2004-01-01	63.825
2005-01-01	63.750
2006-01-01	63.725
2007-01-01	64.350
2008-01-01	64.925
2009-01-01	64.075
2010-01-01	64.000
2011-01-01	63.900
2012-01-01	64.025
2013-01-01	64.050
2014-01-01	63.650
2015-01-01	63.825
2016-01-01	64.200
2017-01-01	64.725