20% (1988)

50% (1986)

60% (1986)

79% (1984)

37% (1987)

50% (1984)

30% (1984)

62% (1987)

0% (1994)

0% (1989)

72% (1985)

45% (1986)

0% (1990)

70% (1982)

70% (1981)

20% (1986)

0% (1987)

0% (1987)

50% (1985)

0% (1990)