Year	Percent
1961	45.87723
1962	45.87723
1963	45.87723
1964	45.87723
1965	45.87899
1966	45.87899
1967	45.87899
1968	45.87899
1969	45.87899
1970	45.87899
1971	45.87899
1972	45.88075
1973	45.88075
1974	45.88075
1975	45.88075
1976	45.88075
1977	45.88075
1978	45.88075
1979	45.88428
1980	45.88428
1981	45.88428
1982	45.88781
1983	45.88781
1984	45.88781
1985	45.89134
1986	45.89134
1987	45.89487
1988	45.89487
1989	45.90369
1990	45.91428
1991	45.70254
1992	45.61431
1993	45.79076
1994	45.87017
1995	45.78194
1996	45.78194
1997	45.70254
1998	45.57902
1999	45.59667
2000	45.79076
2001	45.52609
2002	45.60549
2003	45.51727
2004	45.57197
2005	45.55079
2006	45.52962
2007	45.49609
2008	45.66725
2009	45.73254
2010	45.63196
2011	45.74665
2012	45.67784
2013	45.66901
2014	45.88428
2015	45.63302
2016	45.63302
2017	45.63302
2018	45.63302
2019	45.63372
2020	45.63372
2021	45.63372