51% (1973)

58% (1972)

63% (1976)

64% (1974)

65% (1972)

43% (1978)

80% (1978)

80% (1980)

42% (1979)

66% (1980)

0% (1977)

60% (1975)

100% (1986)

0% (1980)

0% (1974)

80% (1976)

50% (1973)

66% (1975)

0% (1973)

60% (1985)