Year	Percent
1961	7.40741
1962	5.55556
1963	5.55556
1964	7.40741
1965	7.40741
1966	7.40741
1967	7.40741
1968	5.55556
1969	5.55556
1970	5.55556
1971	5.55556
1972	5.55556
1973	5.55556
1974	5.55556
1975	5.55556
1976	5.55556
1977	5.55556
1978	5.55556
1979	5.55556
1980	5.55556
1981	5.55556
1982	5.55556
1983	5.55556
1984	5.55556
1985	5.55556
1986	5.55556
1987	5.55556
1988	5.55556
1989	5.55556
1990	5.55556
1991	5.55556
1992	5.55556
1993	5.55556
1994	5.55556
1995	7.40741
1996	7.40741
1997	7.40741
1998	7.40741
1999	7.40741
2000	7.40741
2001	7.40741
2002	7.40741
2003	7.40741
2004	7.40741
2005	7.40741
2006	7.40741
2007	7.40741
2008	5.55556
2009	5.55556
2010	5.55556
2011	5.55556
2012	5.55556
2013	5.55556
2014	5.55556
2015	5.55556
2016	5.55556
2017	5.55556
2018	5.55556
2019	5.55556
2020	5.55556
2021	5.55556