Year	Percent (Units)
1992	0.005
1993	0.006
1994	0.007
1995	0.007
1996	0.007
1997	0.007
1998	0.007
1999	0.007
2000	0.006
2001	0.006
2002	0.006
2003	0.006
2004	0.005
2005	0.005
2006	0.005
2007	0.005
2008	0.004
2009	0.004
2010	0.005
2011	0.005
2012	0.005
2013	0.005
2014	0.006
2015	0.005
2016	0.005
2017	0.004
2018	0.005
2019	0.005