Year	Percent
2000-01-01	72.025
2001-01-01	73.125
2002-01-01	72.950
2003-01-01	72.325
2004-01-01	71.125
2005-01-01	70.875
2006-01-01	70.050
2007-01-01	72.425
2008-01-01	72.600
2009-01-01	72.875
2010-01-01	69.425
2011-01-01	69.250
2012-01-01	70.775
2013-01-01	70.025
2014-01-01	67.700
2015-01-01	69.425
2016-01-01	69.200
2017-01-01	69.700