65% (1961)

67% (1974)

81% (1968)

75% (1962)

70% (1983)

83% (1975)

71% (1971)

80% (1969)

70% (1971)

35% (1968)

90% (1990)

78% (1980)

64% (1980)

77% (1973)

63% (1988)

80% (1980)

63% (1974)

70% (1978)

55% (1988)

77% (1985)