Year	Percent
2003-01-01	83.250
2004-01-01	82.275
2005-01-01	83.775
2006-01-01	84.600
2007-01-01	85.150
2008-01-01	83.575
2009-01-01	78.325
2010-01-01	78.175
2011-01-01	78.475
2012-01-01	79.675
2013-01-01	81.100
2014-01-01	82.950
2015-01-01	84.725
2016-01-01	86.525
2017-01-01	86.100