Year	Percent (Units)
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	0.002
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	0.004
2009	0.004
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	0.003
2019	0.003
2020	0.003
2021	0.003
2022	0.003
2023	0.003
2024	0.003
2025	0.003
2026	0.003
2027	0.003
2028	0.003
2029	0.003