Year	Percent
2003-01-01	87.875
2004-01-01	87.725
2005-01-01	87.750
2006-01-01	87.975
2007-01-01	88.400
2008-01-01	89.300
2009-01-01	87.725
2010-01-01	87.375
2011-01-01	86.850
2012-01-01	85.975
2013-01-01	85.150
2014-01-01	84.375
2015-01-01	83.675
2016-01-01	84.225
2017-01-01	85.025