Year	Percent
2000-01-01	66.375
2001-01-01	64.300
2002-01-01	63.850
2003-01-01	61.700
2004-01-01	61.075
2005-01-01	60.575
2006-01-01	56.925
2007-01-01	57.525
2008-01-01	61.725
2009-01-01	56.875
2010-01-01	56.575
2011-01-01	54.675
2012-01-01	56.275
2013-01-01	55.925
2014-01-01	53.050
2015-01-01	55.250
2016-01-01	53.975
2017-01-01	53.525