Year	Percent
1961	46.93607
1962	46.93607
1963	46.93607
1964	46.94093
1965	46.94093
1966	46.94093
1967	46.94458
1968	46.94458
1969	46.94458
1970	46.94701
1971	46.94943
1972	46.94943
1973	46.94943
1974	46.94943
1975	46.94943
1976	46.95186
1977	46.95186
1978	46.95308
1979	46.95308
1980	46.95429
1981	46.95429
1982	46.95429
1983	46.96037
1984	46.96037
1985	46.96037
1986	46.96037
1987	46.96037
1988	46.96037
1989	46.96037
1990	46.96037
1991	46.96037
1992	46.96037
1993	47.00652
1994	47.06725
1995	47.15228
1996	47.15228
1997	47.15228
1998	47.15228
1999	47.15228
2000	47.15228
2001	47.15228
2002	47.15228
2003	47.15228
2004	47.15228
2005	47.15228
2006	47.15228
2007	47.1377
2008	47.1377
2009	47.1377
2010	47.13892
2011	47.13892
2012	47.13892
2013	47.13892
2014	47.13892
2015	47.14013
2016	47.14013
2017	47.14135
2018	47.14135
2019	47.14135
2020	47.14135
2021	47.14256