Year	Percent
2000-01-01	67.275
2001-01-01	69.575
2002-01-01	69.475
2003-01-01	67.750
2004-01-01	65.375
2005-01-01	64.900
2006-01-01	65.100
2007-01-01	67.900
2008-01-01	68.850
2009-01-01	68.425
2010-01-01	63.475
2011-01-01	62.600
2012-01-01	62.500
2013-01-01	61.025
2014-01-01	58.850
2015-01-01	61.675
2016-01-01	62.100
2017-01-01	63.600