67% (1981)

64% (1981)

70% (1979)

77% (1979)

63% (1981)

51% (1990)

78% (1980)

50% (1984)

63% (1980)

63% (1990)

74% (1982)

48% (1981)

76% (1982)

54% (1979)

56% (1979)

55% (1987)

69% (1991)

70% (1984)

43% (1992)

0% (1981)