43% (1953)

55% (1976)

77% (1975)

63% (1958)

65% (1955)

76% (1952)

82% (1975)

74% (1969)

68% (1969)

64% (1965)

69% (1976)

73% (1965)

76% (1953)

62% (1959)

68% (1977)

70% (1973)

50% (1957)

56% (1954)

53% (1972)

41% (1977)