59% (1982)

80% (1980)

55% (1978)

45% (1984)

60% (1980)

58% (1982)

60% (1980)

69% (1984)

83% (1981)

64% (1989)

71% (1981)

59% (1987)

20% (1985)

38% (1991)

46% (1985)

55% (1987)

60% (1986)

62% (1980)

69% (1981)

30% (1978)