59% (1982)

80% (1980)

55% (1978)

82% (1981)

62% (1980)

69% (1984)

55% (1987)

60% (1980)

71% (1981)

20% (1985)

48% (1982)

53% (1982)

45% (1982)

69% (1986)

64% (1989)

50% (1981)

20% (1980)

52% (1984)

38% (1991)

60% (1983)