Year	Percent
1961	51.77866
1962	51.87747
1963	51.97628
1964	52.0751
1965	52.17391
1966	52.27273
1967	52.47036
1968	52.47036
1969	52.66798
1970	52.7668
1971	53.06324
1972	53.55731
1973	54.05138
1974	56.71937
1975	56.12648
1976	56.02767
1977	56.71937
1978	57.41107
1979	56.32411
1980	55.63241
1981	57.80632
1982	59.88142
1983	58.00395
1984	56.62055
1985	56.62055
1986	57.31225
1987	57.80632
1988	59.09091
1989	57.11462
1990	57.50988
1991	57.50988
1992	54.1502
1993	54.05138
1994	55.03953
1995	55.03953
1996	55.03953
1997	55.03953
1998	56.02767
1999	56.02767
2000	50
2001	47.82609
2002	48.51779
2003	46.5415
2004	47.2332
2005	47.9249
2006	49.01186
2007	49.01186
2008	55.92885
2009	61.46245
2010	63.63636
2011	63.63636
2012	63.63636
2013	63.63636
2014	63.63636
2015	63.63636
2016	63.63636
2017	62.64822
2018	62.64822
2019	62.64822
2020	62.64822
2021	62.64822