48% (1977)

73% (1973)

46% (1983)

68% (1976)

59% (1982)

55% (1980)

64% (1976)

49% (1973)

52% (1978)

47% (1978)

48% (1983)

54% (1978)

34% (1977)

27% (1986)

47% (1983)

42% (1981)

43% (1982)

48% (1982)

40% (1974)

32% (1983)