58% (1972)

63% (1976)

64% (1974)

60% (1975)

48% (1973)

66% (1980)

60% (1985)

43% (1978)

65% (1972)

50% (1973)

80% (1976)

100% (1986)

0% (1973)

66% (1975)

55% (1974)

80% (1980)

0% (1973)

42% (1979)

0% (1980)

80% (1978)