Year	Percent (Units)
1991	0.006
1992	0.005
1993	0.005
1994	0.004
1995	0.004
1996	0.004
1997	0.004
1998	0.004
1999	0.004
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	0.004
2015	0.004
2016	0.004
2017	0.004
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	0.005
2027	0.005
2028	0.005
2029	0.005