58% (1982)

53% (1982)

62% (1982)

57% (1979)

47% (1979)

50% (1976)

40% (1976)

52% (1977)

41% (1984)

52% (1974)

27% (1985)

41% (1984)

52% (1984)

27% (1985)

68% (1979)

36% (1980)