Year	Percent
2000-01-01	69.950
2001-01-01	68.925
2002-01-01	68.200
2003-01-01	69.000
2004-01-01	68.900
2005-01-01	68.050
2006-01-01	71.125
2007-01-01	71.975
2008-01-01	72.575
2009-01-01	71.800
2010-01-01	70.875
2011-01-01	72.125
2012-01-01	72.675
2013-01-01	72.900
2014-01-01	73.650
2015-01-01	74.450
2016-01-01	75.725
2017-01-01	76.875