Year	Percent
2003-01-01	86.225
2004-01-01	84.875
2005-01-01	86.000
2006-01-01	87.050
2007-01-01	87.100
2008-01-01	86.175
2009-01-01	84.600
2010-01-01	84.750
2011-01-01	84.525
2012-01-01	84.875
2013-01-01	85.800
2014-01-01	87.350
2015-01-01	88.375
2016-01-01	89.350
2017-01-01	88.650