60% (1988)

68% (1985)

66% (1985)

58% (1985)

70% (1990)

64% (1988)

69% (1984)

45% (1983)

66% (1984)

48% (1985)

50% (1987)

0% (1991)

74% (1986)

0% (1986)

57% (1992)

0% (1982)

20% (1982)

20% (1982)

0% (1991)

0% (1988)