Year	Percent
2003-01-01	88.225
2004-01-01	87.350
2005-01-01	87.675
2006-01-01	88.350
2007-01-01	88.500
2008-01-01	87.375
2009-01-01	83.000
2010-01-01	82.900
2011-01-01	83.400
2012-01-01	84.450
2013-01-01	84.725
2014-01-01	86.400
2015-01-01	88.350
2016-01-01	89.850
2017-01-01	89.825