10% (1980)

72% (1978)

72% (1979)

40% (1983)

55% (1983)

60% (1982)

70% (1977)

0% (1993)

0% (1986)

0% (1984)

0% (1982)

65% (1975)

55% (1985)

0% (1979)

50% (1981)

40% (1976)

10% (1983)

10% (1982)

58% (1975)

0% (1984)