Year	Percent
1961	64.70588
1962	64.70588
1963	64.70588
1964	64.70588
1965	64.70588
1966	64.70588
1967	64.70588
1968	64.70588
1969	64.70588
1970	64.70588
1971	64.70588
1972	58.82353
1973	58.82353
1974	58.82353
1975	58.82353
1976	58.82353
1977	58.82353
1978	55.88235
1979	55.88235
1980	47.05882
1981	47.05882
1982	47.05882
1983	47.05882
1984	47.05882
1985	41.17647
1986	41.17647
1987	38.23529
1988	38.23529
1989	38.23529
1990	38.23529
1991	35.29412
1992	35.29412
1993	35.29412
1994	35.29412
1995	32.35294
1996	32.35294
1997	32.35294
1998	32.35294
1999	35.29412
2000	35.29412
2001	38.23529
2002	38.23529
2003	35.29412
2004	35.29412
2005	26.47059
2006	26.47059
2007	26.47059
2008	26.47059
2009	29.41176
2010	29.41176
2011	29.41176
2012	23.52941
2013	23.52941
2014	23.52941
2015	23.52941
2016	23.52941
2017	23.52941
2018	23.52941
2019	23.52941
2020	23.52941
2021	23.52941