67% (1981)

63% (1981)

51% (1990)

78% (1980)

71% (1979)

77% (1979)

76% (1980)

64% (1980)

65% (1981)

50% (1984)

62% (1990)

54% (1979)

66% (1980)

87% (1985)

41% (1984)

64% (1975)

0% (1984)

53% (1992)

52% (1981)

10% (1981)