70% (1962)

65% (1961)

83% (1975)

66% (1974)

71% (1971)

80% (1980)

80% (1969)

78% (1973)

10% (1971)

35% (1968)

57% (1976)

69% (1984)

90% (1962)

62% (1985)

81% (1980)

64% (1980)

82% (1985)

70% (1978)

77% (1985)

15% (1977)