63% (1982)

27% (1985)

52% (1977)

46% (1979)

58% (1982)

52% (1974)

36% (1980)

53% (1982)

51% (1976)

53% (1984)

58% (1979)

35% (1985)

47% (1984)

43% (1984)

40% (1976)

68% (1979)