10% (1984)

0% (1972)

0% (1985)

0% (1987)

0% (1984)

0% (1988)

50% (1975)

0% (1971)

0% (1986)

30% (1970)

60% (1984)

0% (1985)

0% (1967)

0% (1972)

50% (1970)

50% (1971)

67% (1987)

0% (1979)

0% (1985)

52% (1986)