Year	Percent
2000-01-01	70.550
2001-01-01	70.725
2002-01-01	70.500
2003-01-01	70.750
2004-01-01	70.850
2005-01-01	70.825
2006-01-01	70.825
2007-01-01	70.925
2008-01-01	70.725
2009-01-01	68.375
2010-01-01	67.975
2011-01-01	67.775
2012-01-01	68.200
2013-01-01	68.525
2014-01-01	69.575
2015-01-01	70.225
2016-01-01	70.750
2017-01-01	70.875