Year	Percent
1998-01-01	10.00000
1999-01-01	11.00000
2000-01-01	10.00000
2001-01-01	10.00000
2002-01-01	10.70000
2003-01-01	10.70000
2004-01-01	9.60000
2005-01-01	9.60000
2006-01-01	9.60000
2007-01-01	9.20000
2008-01-01	7.20000
2009-01-01	9.20000
2010-01-01	8.96767
2011-01-01	8.32237
2012-01-01	8.92159
2013-01-01	8.21692
2014-01-01	8.41271
2015-01-01	9.00075
2016-01-01	9.22995