82% (1985)

82% (1979)

78% (1972)

80% (1975)

80% (1966)

71% (1938)

80% (1957)

78% (1969)

75% (1966)

77% (1925)

75% (1965)

79% (1962)

78% (1967)

80% (1975)

71% (1968)

68% (1938)

79% (1976)

69% (1967)

76% (1980)

55% (1953)