Year	Percent
2003-01-01	85.325
2004-01-01	84.625
2005-01-01	85.525
2006-01-01	86.875
2007-01-01	87.225
2008-01-01	86.450
2009-01-01	84.075
2010-01-01	83.950
2011-01-01	83.175
2012-01-01	82.625
2013-01-01	83.675
2014-01-01	85.625
2015-01-01	86.275
2016-01-01	87.725
2017-01-01	86.700