Year	Percent
2000-01-01	65.175
2001-01-01	63.600
2002-01-01	65.950
2003-01-01	67.750
2004-01-01	68.025
2005-01-01	68.175
2006-01-01	69.300
2007-01-01	70.650
2008-01-01	70.425
2009-01-01	70.625
2010-01-01	70.375
2011-01-01	71.900
2012-01-01	71.650
2013-01-01	72.100
2014-01-01	71.350
2015-01-01	73.050
2016-01-01	71.075
2017-01-01	70.350