82% (1985)

82% (1979)

80% (1966)

80% (1975)

78% (1972)

77% (1925)

79% (1962)

80% (1957)

76% (1968)

72% (1970)

80% (1975)

75% (1965)

69% (1967)

78% (1969)

75% (1970)

77% (1980)

79% (1964)

76% (1966)

67% (1980)

80% (1959)