Year	Percent (Units)
1980	0.004
1981	0.004
1982	0.005
1983	0.005
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	0.005
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	0.005
2007	0.005
2008	0.005
2009	0.005
2010	0.005
2011	0.005
2012	0.005
2013	0.005
2014	0.005
2015	0.006
2016	0.005
2017	0.005
2018	0.004
2019	0.004
2020	0.004
2021	0.004
2022	0.004
2023	0.004
2024	0.004
2025	0.004
2026	0.004
2027	0.004
2028	0.004
2029	0.004