70% (1985)

60% (1988)

67% (1987)

100% (1986)

40% (1986)

40% (1981)

33% (1988)

49% (1985)

59% (1983)

52% (1983)

70% (1989)

58% (1985)

52% (1984)

52% (1983)

43% (1989)

48% (1984)

0% (1987)

58% (1985)

57% (1987)

30% (1984)