39% (1982)

59% (1977)

45% (1982)

42% (1982)

52% (1978)

58% (1979)

74% (1978)

50% (1978)

47% (1989)

72% (1981)

53% (1979)

54% (1990)

51% (1978)

58% (1977)

27% (1979)

54% (1987)

64% (1978)

52% (1977)

50% (1979)

57% (1985)