39% (1985)

20% (1971)

22% (1968)

43% (1986)

46% (1967)

49% (1979)

24% (1984)

47% (1989)

55% (1984)

52% (1982)

20% (1971)

38% (1972)

45% (1974)

57% (1973)

44% (1968)

47% (1971)

37% (1986)

59% (1986)

53% (1986)

47% (1975)