54% (1983)

50% (1976)

58% (1983)

63% (1982)

57% (1979)

28% (1985)

52% (1977)

45% (1979)

53% (1974)

36% (1980)

53% (1984)

47% (1984)

40% (1976)

44% (1984)

68% (1979)

35% (1985)