Year	Percent
2000-01-01	68.175
2001-01-01	68.550
2002-01-01	68.550
2003-01-01	68.825
2004-01-01	69.500
2005-01-01	70.775
2006-01-01	71.875
2007-01-01	75.600
2008-01-01	74.850
2009-01-01	73.000
2010-01-01	71.575
2011-01-01	71.175
2012-01-01	71.125
2013-01-01	71.825
2014-01-01	71.825
2015-01-01	72.050
2016-01-01	72.675
2017-01-01	72.650