Year	Percent
2000-01-01	88.925
2001-01-01	89.025
2002-01-01	88.300
2003-01-01	86.250
2004-01-01	86.325
2005-01-01	86.475
2006-01-01	87.725
2007-01-01	89.100
2008-01-01	89.425
2009-01-01	88.300
2010-01-01	87.100
2011-01-01	87.050
2012-01-01	86.950
2013-01-01	86.525
2014-01-01	86.275
2015-01-01	85.300
2016-01-01	84.450
2017-01-01	84.300