82% (1985)

81% (1979)

78% (1929)

78% (1972)

77% (1965)

78% (1983)

77% (1925)

76% (1968)

69% (1967)

80% (1975)

79% (1957)

80% (1966)

79% (1975)

63% (1965)

78% (1971)

74% (1944)

60% (1969)

74% (1969)

78% (1962)

28% (1982)