Year	Percent
2003-01-01	89.625
2004-01-01	89.500
2005-01-01	89.650
2006-01-01	89.700
2007-01-01	90.100
2008-01-01	90.575
2009-01-01	88.575
2010-01-01	87.750
2011-01-01	88.325
2012-01-01	87.125
2013-01-01	89.875
2014-01-01	91.400
2015-01-01	91.850
2016-01-01	92.175
2017-01-01	90.875