58% (1986)

52% (1984)

20% (1992)

61% (1992)

63% (1987)

40% (1984)

49% (1990)

50% (1988)

38% (1984)

44% (1972)

30% (1987)

37% (1985)

40% (1975)

23% (1990)

53% (1987)

40% (1977)

55% (1993)

54% (1980)

40% (1993)

47% (1970)