0% (1979)

80% (1981)

0% (1978)

80% (1986)

50% (1992)

70% (1982)

40% (1985)

0% (1976)

71% (1986)

0% (1982)

0% (1979)

70% (1986)

78% (1984)

30% (1978)

0% (1976)

0% (1979)

0% (1985)

70% (1985)

58% (1985)

0% (1979)