Year	Percent
2000-01-01	66.075
2001-01-01	67.225
2002-01-01	67.600
2003-01-01	66.850
2004-01-01	66.425
2005-01-01	66.450
2006-01-01	67.425
2007-01-01	68.875
2008-01-01	69.825
2009-01-01	69.650
2010-01-01	67.325
2011-01-01	66.475
2012-01-01	66.400
2013-01-01	65.425
2014-01-01	64.850
2015-01-01	65.375
2016-01-01	65.825
2017-01-01	66.675