Year	Percent
2000-01-01	87.425
2001-01-01	87.450
2002-01-01	87.150
2003-01-01	85.925
2004-01-01	86.100
2005-01-01	86.450
2006-01-01	86.925
2007-01-01	87.425
2008-01-01	88.475
2009-01-01	88.075
2010-01-01	87.300
2011-01-01	87.000
2012-01-01	86.825
2013-01-01	86.575
2014-01-01	86.775
2015-01-01	86.525
2016-01-01	86.350
2017-01-01	85.625