45% (1987)

52% (1987)

58% (1987)

57% (1967)

52% (1986)

41% (1985)

61% (1983)

54% (1982)

52% (1985)

43% (1983)

53% (1975)

37% (1984)

50% (1988)

46% (1981)

22% (1985)

40% (1987)

30% (1985)

20% (1988)

50% (1987)