39% (1982)

42% (1982)

27% (1979)

52% (1978)

74% (1978)

72% (1981)

51% (1978)

59% (1977)

53% (1979)

58% (1978)

64% (1978)

72% (1988)

49% (1980)

47% (1989)

53% (1977)

52% (1977)

58% (1977)

50% (1979)

50% (1982)

42% (1978)