73% (1985)

50% (1986)

70% (1982)

37% (1987)

59% (1987)

20% (1988)

0% (1994)

45% (1986)

70% (1981)

20% (1986)

30% (1984)

0% (1990)

0% (1987)

50% (1985)

0% (1990)

50% (1984)

0% (1985)

0% (1989)