Year	Percent
2005-01-01	85.100
2006-01-01	85.200
2007-01-01	86.100
2008-01-01	87.200
2009-01-01	86.700
2010-01-01	84.325
2011-01-01	85.425
2012-01-01	85.750
2013-01-01	85.225
2014-01-01	85.775
2015-01-01	86.275
2016-01-01	86.300
2017-01-01	86.175