80% (1986)

30% (1985)

60% (1984)

60% (1981)

54% (1986)

71% (1976)

53% (1986)

0% (1988)

30% (1990)

50% (1987)

0% (1976)

90% (1985)

0% (1973)

0% (1970)

0% (1971)

0% (1972)

0% (1981)

0% (1975)

0% (1983)

0% (1973)