69% (1990)

47% (1988)

60% (1988)

33% (1988)

40% (1989)

32% (1987)

0% (1984)

61% (1988)

58% (1989)

0% (1987)

58% (1989)

45% (1989)

38% (1987)

43% (1986)

43% (1988)

30% (1991)

53% (1987)

50% (1989)

33% (1986)

40% (1992)