Year	Percent
2000-01-01	67.975
2001-01-01	67.950
2002-01-01	66.900
2003-01-01	66.275
2004-01-01	65.750
2005-01-01	65.175
2006-01-01	64.875
2007-01-01	64.150
2008-01-01	64.325
2009-01-01	61.325
2010-01-01	60.925
2011-01-01	60.725
2012-01-01	60.950
2013-01-01	60.225
2014-01-01	59.500
2015-01-01	59.975
2016-01-01	59.300
2017-01-01	58.350