Year	Percent
2005-01-01	83.650
2006-01-01	84.150
2007-01-01	84.250
2008-01-01	84.625
2009-01-01	84.675
2010-01-01	84.975
2011-01-01	85.025
2012-01-01	85.350
2013-01-01	85.375
2014-01-01	85.475
2015-01-01	85.400
2016-01-01	85.500
2017-01-01	85.650