Year	Percent
2000-01-01	70.050
2001-01-01	71.225
2002-01-01	70.575
2003-01-01	68.925
2004-01-01	66.325
2005-01-01	65.475
2006-01-01	67.150
2007-01-01	68.950
2008-01-01	69.775
2009-01-01	67.525
2010-01-01	62.575
2011-01-01	59.950
2012-01-01	59.750
2013-01-01	59.175
2014-01-01	58.700
2015-01-01	59.875
2016-01-01	59.575
2017-01-01	61.050