Year	Percent
1998-01-01	94.375
1999-01-01	94.500
2000-01-01	94.350
2001-01-01	94.125
2002-01-01	94.100
2003-01-01	94.325
2004-01-01	94.600
2005-01-01	94.600
2006-01-01	94.725
2007-01-01	94.600
2008-01-01	94.375
2009-01-01	94.400
2010-01-01	94.200
2011-01-01	93.500
2012-01-01	93.575
2013-01-01	93.575
2014-01-01	93.125
2015-01-01	93.100
2016-01-01	93.150
2017-01-01	93.000