Year	Percent
2000-01-01	75.100
2001-01-01	74.875
2002-01-01	74.775
2003-01-01	74.875
2004-01-01	74.650
2005-01-01	74.700
2006-01-01	75.100
2007-01-01	75.050
2008-01-01	75.300
2009-01-01	74.725
2010-01-01	74.375
2011-01-01	74.225
2012-01-01	74.400
2013-01-01	74.425
2014-01-01	74.325
2015-01-01	74.300
2016-01-01	74.425
2017-01-01	74.225