82% (1979)

83% (1985)

76% (1965)

80% (1975)

78% (1972)

63% (1965)

78% (1983)

76% (1925)

79% (1967)

71% (1970)

73% (1974)

79% (1973)

78% (1929)

79% (1969)

80% (1975)

74% (1969)

79% (1964)

76% (1965)

80% (1957)

80% (1966)