Year	Percent
1980	0.001
1981	0.001
1982	0.001
1983	0.002
1984	0.001
1985	0.002
1986	0.002
1987	0.002
1988	0.002
1989	0.002
1990	0.002
1991	0.002
1992	0.001
1993	0.001
1994	0.001
1995	0.001
1996	0.001
1997	0.001
1998	0.002
1999	0.002
2000	0.002
2001	0.001
2002	0.001
2003	0.002
2004	0.001
2005	0.002
2006	0.001
2007	0.001
2008	0.001
2009	0.001
2010	0.001
2011	0.001
2012	0.001
2013	0.001
2014	0.001
2015	0.001
2016	0.001
2017	0.001
2018	0.001
2019	0.001
2020	0.001
2021	0.001
2022	0.001
2023	0.001
2024	0.001