78% (1984)

69% (1982)

60% (1986)

72% (1985)

55% (1986)

0% (1994)

37% (1987)

20% (1988)

59% (1987)

50% (1984)

0% (1990)

50% (1985)

30% (1984)

45% (1986)

0% (1987)

70% (1981)

0% (1989)

0% (1990)

20% (1986)

0% (1987)