Year	Percent
2000-01-01	70.250
2001-01-01	69.975
2002-01-01	69.775
2003-01-01	69.900
2004-01-01	69.625
2005-01-01	69.575
2006-01-01	69.875
2007-01-01	69.825
2008-01-01	69.950
2009-01-01	69.350
2010-01-01	69.000
2011-01-01	68.800
2012-01-01	68.875
2013-01-01	68.775
2014-01-01	68.575
2015-01-01	68.550
2016-01-01	68.600
2017-01-01	68.250