66% (1976)

82% (1984)

77% (1959)

59% (1974)

69% (1979)

78% (1987)

72% (1966)

53% (1981)

79% (1962)

76% (1973)

70% (1978)

74% (1961)

68% (1991)

55% (1975)

76% (1966)

83% (1959)

63% (1967)

72% (1961)

50% (1979)

75% (1967)