Year	Percent
2000-01-01	63.975
2001-01-01	64.225
2002-01-01	64.250
2003-01-01	64.425
2004-01-01	64.650
2005-01-01	64.825
2006-01-01	64.875
2007-01-01	64.825
2008-01-01	64.800
2009-01-01	63.350
2010-01-01	62.950
2011-01-01	62.800
2012-01-01	63.100
2013-01-01	63.525
2014-01-01	64.625
2015-01-01	65.250
2016-01-01	65.850
2017-01-01	66.250