68% (1975)

70% (1974)

80% (1979)

64% (1986)

48% (1977)

100% (1984)

65% (1981)

34% (1979)

52% (1980)

60% (1984)

62% (1984)

90% (1973)

0% (1980)

0% (1978)

54% (1985)

71% (1983)

30% (1980)

50% (1976)

0% (1975)

0% (1983)