Year	Percent
1980	0.002
1981	0.002
1982	0.002
1983	0.002
1984	0.002
1985	0.002
1986	0.002
1987	0.002
1988	0.002
1989	0.002
1990	0.002
1991	0.002
1992	0.002
1993	0.002
1994	0.001
1995	0.001
1996	0.001
1997	0.001
1998	0.001
1999	0.001
2000	0.001
2001	0.001
2002	0.001
2003	0.001
2004	0.001
2005	0.001
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