Year	Percent
1992-01-01	9.50
1993-01-01	8.00
1994-01-01	8.50
1995-01-01	9.50
1996-01-01	10.50
1997-01-01	13.00
1998-01-01	7.50
1999-01-01	5.00
2000-01-01	5.00
2001-01-01	3.75
2002-01-01	1.75
2003-01-01	1.00
2004-01-01	1.50
2005-01-01	1.00
2006-01-01	1.50
2007-01-01	2.50
2008-01-01	1.25
2009-01-01	0.25
2010-01-01	0.25
2011-01-01	0.25
2012-01-01	0.05
2013-01-01	0.05
2014-01-01	0.05
2015-01-01	0.05
2016-01-01	0.05
2017-01-01	0.05