Year	Percent
2003-01-01	82.750
2004-01-01	81.200
2005-01-01	82.650
2006-01-01	83.375
2007-01-01	82.725
2008-01-01	81.700
2009-01-01	81.250
2010-01-01	81.825
2011-01-01	81.725
2012-01-01	82.625
2013-01-01	83.325
2014-01-01	84.675
2015-01-01	85.875
2016-01-01	86.325
2017-01-01	85.875