Year	Percent
2000-01-01	64.125
2001-01-01	63.950
2002-01-01	62.900
2003-01-01	62.175
2004-01-01	62.350
2005-01-01	62.800
2006-01-01	62.150
2007-01-01	61.925
2008-01-01	62.700
2009-01-01	63.425
2010-01-01	63.725
2011-01-01	64.050
2012-01-01	64.250
2013-01-01	64.400
2014-01-01	64.700
2015-01-01	64.550
2016-01-01	64.825
2017-01-01	65.175