68% (1967)

74% (1965)

78% (1961)

79% (1962)

84% (1965)

47% (1968)

72% (1966)

64% (1961)

59% (1965)

72% (1960)

73% (1963)

50% (1976)

64% (1966)

60% (1966)

56% (1983)

76% (1963)

55% (1966)

50% (1966)

52% (1963)

54% (1972)