77% (1976)

50% (1992)

62% (1964)

62% (1975)

79% (1973)

49% (1967)

80% (1967)

64% (1974)

40% (1975)

55% (1968)

59% (1977)

57% (1974)

49% (1976)

49% (1965)

68% (1967)

53% (1963)

63% (1971)

53% (1962)

44% (1965)

74% (1978)