Year	Percent
1998-01-01	95.075
1999-01-01	95.075
2000-01-01	94.925
2001-01-01	94.925
2002-01-01	94.825
2003-01-01	94.450
2004-01-01	94.575
2005-01-01	94.850
2006-01-01	94.825
2007-01-01	95.050
2008-01-01	94.775
2009-01-01	95.075
2010-01-01	95.500
2011-01-01	95.325
2012-01-01	95.475
2013-01-01	95.825
2014-01-01	95.625
2015-01-01	95.425
2016-01-01	95.375
2017-01-01	95.650