Year	Percent
2003-01-01	90.450
2004-01-01	89.025
2005-01-01	89.150
2006-01-01	89.975
2007-01-01	89.675
2008-01-01	89.050
2009-01-01	88.425
2010-01-01	88.525
2011-01-01	88.375
2012-01-01	88.525
2013-01-01	88.900
2014-01-01	90.275
2015-01-01	91.225
2016-01-01	92.150
2017-01-01	91.525