Year	Percent
2000-01-01	64.375
2001-01-01	63.275
2002-01-01	64.025
2003-01-01	61.975
2004-01-01	61.600
2005-01-01	60.350
2006-01-01	57.450
2007-01-01	58.800
2008-01-01	61.975
2009-01-01	57.900
2010-01-01	56.750
2011-01-01	55.625
2012-01-01	57.025
2013-01-01	57.025
2014-01-01	54.400
2015-01-01	55.900
2016-01-01	54.575
2017-01-01	53.750