77% (1963)

76% (1960)

79% (1960)

80% (1960)

57% (1960)

64% (1959)

68% (1971)

56% (1962)

54% (1962)

62% (1963)

61% (1975)

72% (1986)

63% (1973)

73% (1955)

69% (1959)

36% (1992)

56% (1962)

60% (1962)

38% (1960)

40% (1954)