48% (1977)

46% (1983)

73% (1973)

55% (1980)

48% (1983)

68% (1976)

57% (1982)

50% (1978)

46% (1978)

50% (1983)

50% (1973)

64% (1976)

53% (1978)

41% (1981)

34% (1977)

27% (1986)

41% (1967)

46% (1982)

30% (1983)

33% (1979)