48% (1977)

46% (1983)

39% (1984)

73% (1973)

50% (1978)

56% (1980)

58% (1978)

68% (1976)

58% (1982)

27% (1986)

46% (1978)

34% (1977)

64% (1976)

53% (1978)

41% (1981)

54% (1964)

58% (1964)

48% (1982)

39% (1983)

50% (1983)