Year	Percent
2000-01-01	84.100
2001-01-01	84.300
2002-01-01	84.525
2003-01-01	84.050
2004-01-01	83.900
2005-01-01	83.700
2006-01-01	83.925
2007-01-01	84.650
2008-01-01	85.300
2009-01-01	85.275
2010-01-01	83.725
2011-01-01	83.200
2012-01-01	83.925
2013-01-01	84.275
2014-01-01	84.175
2015-01-01	84.575
2016-01-01	84.350
2017-01-01	84.200