Year	Percent
2000-01-01	65.150
2001-01-01	65.825
2002-01-01	65.450
2003-01-01	65.500
2004-01-01	66.275
2005-01-01	67.625
2006-01-01	68.675
2007-01-01	71.725
2008-01-01	69.675
2009-01-01	63.650
2010-01-01	61.000
2011-01-01	60.050
2012-01-01	59.900
2013-01-01	61.725
2014-01-01	63.100
2015-01-01	64.725
2016-01-01	66.450
2017-01-01	67.650