Year	Percent
1975-12-31	11.25
1976-12-31	14.25
1977-12-31	7
1978-12-31	12.5
1979-12-31	17
1980-12-31	14
1981-12-31	14.375
1982-12-31	10
1983-12-31	9.0625
1984-12-31	9.5
1985-12-31	11.375
1986-12-31	10.875
1987-12-31	8.375
1988-12-31	12.875
1989-12-31	14.875
1990-12-31	13.875
1991-12-31	10.375
1992-12-31	6.875
1993-12-31	5.375
1994-12-31	6.125
1995-12-31	6.375
1996-12-31	5.9375
1997-12-31	7.25
1998-12-31	6.25
1999-12-31	5.5
2000-12-31	6
2001-12-31	4
2002-12-31	4
2003-12-31	3.75
2004-12-31	4.75
2005-12-31	4.5
2006-12-31	5
2007-12-31	5.5
2008-12-31	2
2009-12-31	0.5
2010-12-31	0.5
2011-12-31	0.5
2012-12-31	0.5
2013-12-31	0.5
2014-12-31	0.5
2015-12-31	0.5
2016-12-31	0.25
2017-12-31	0.5
2018-12-31	0.75
2019-12-31	0.75
2020-12-31	0.1
2021-12-31	0.25
2022-12-31	3.5
2023-12-31	5.25