45% (1986)

50% (1979)

0% (1987)

20% (1991)

30% (1982)

20% (1989)

0% (1978)

50% (1980)

0% (1981)

0% (1986)

0% (1977)

20% (1980)

0% (1978)

0% (1977)

69% (1980)

0% (1989)

40% (1978)

0% (1980)

32% (1987)

10% (1989)