Year	Percent
1980	0.002
1981	0.002
1982	0.001
1983	0.001
1984	0.002
1985	0.001
1986	0.002
1987	0.002
1988	0.002
1989	0.002
1990	0.002
1991	0.002
1992	0.002
1993	0.003
1994	0.003
1995	0.002
1996	0.002
1997	0.002
1998	0.002
1999	0.003
2000	0.003
2001	0.003
2002	0.003
2003	0.003
2004	0.003
2005	0.003
2006	0.003
2007	0.003
2008	0.003
2009	0.003
2010	0.003
2011	0.003
2012	0.003
2013	0.003
2014	0.003
2015	0.003
2016	0.003
2017	0.003
2018	0.002
2019	0.002
2020	0.002
2021	0.002
2022	0.002
2023	0.002
2024	0.002