8% (1979)

62% (1989)

83% (1979)

45% (1984)

55% (1990)

63% (1976)

50% (1981)

70% (1977)

95% (1985)

72% (1988)

65% (1975)

62% (1987)

50% (1985)

63% (1984)

0% (1981)

44% (1974)

73% (1976)

0% (1972)

0% (1988)

64% (1977)