Year	Percent
2005-01-01	93.575
2006-01-01	93.725
2007-01-01	93.775
2008-01-01	93.500
2009-01-01	93.200
2010-01-01	93.200
2011-01-01	93.200
2012-01-01	93.150
2013-01-01	92.900
2014-01-01	92.625
2015-01-01	92.475
2016-01-01	91.950
2017-01-01	91.925