Year	Percent
1980	0.005
1981	0.005
1982	0.005
1983	0.006
1984	0.005
1985	0.005
1986	0.005
1987	0.005
1988	0.005
1989	0.005
1990	0.005
1991	0.005
1992	0.005
1993	0.005
1994	0.005
1995	0.005
1996	0.005
1997	0.004
1998	0.005
1999	0.005
2000	0.005
2001	0.005
2002	0.005
2003	0.005
2004	0.005
2005	0.005
2006	0.004
2007	0.004
2008	0.004
2009	0.005
2010	0.005
2011	0.004
2012	0.004
2013	0.005
2014	0.004
2015	0.004
2016	0.004
2017	0.004
2018	0.004
2019	0.005
2020	0.005
2021	0.005
2022	0.005
2023	0.005
2024	0.005