Year	Percent
2000-01-01	65.825
2001-01-01	66.700
2002-01-01	67.075
2003-01-01	67.750
2004-01-01	66.675
2005-01-01	66.525
2006-01-01	68.150
2007-01-01	69.625
2008-01-01	69.900
2009-01-01	69.500
2010-01-01	69.600
2011-01-01	70.425
2012-01-01	71.775
2013-01-01	71.950
2014-01-01	73.100
2015-01-01	73.400
2016-01-01	74.075
2017-01-01	73.200