56% (1988)

45% (1989)

30% (1991)

70% (1987)

37% (1987)

67% (1989)

66% (1987)

52% (1991)

39% (1988)

0% (1991)

0% (1984)

0% (1987)

54% (1988)

65% (1988)

51% (1987)

57% (1989)

68% (1988)

33% (1986)

51% (1987)

43% (1988)