50% (1976)

57% (1973)

0% (1985)

0% (1983)

0% (1975)

60% (1978)

30% (1976)

0% (1978)

0% (1975)

0% (1973)

80% (1979)

0% (1975)

35% (1979)

0% (1977)

40% (1973)

0% (1979)

0% (1987)

30% (1988)

0% (1986)

0% (1978)