Year	Percent
2005-01-01	86.225
2006-01-01	86.950
2007-01-01	87.625
2008-01-01	87.375
2009-01-01	84.725
2010-01-01	84.025
2011-01-01	83.850
2012-01-01	82.650
2013-01-01	81.650
2014-01-01	81.800
2015-01-01	82.375
2016-01-01	83.225
2017-01-01	84.050