58% (1972)

49% (1973)

80% (1978)

64% (1976)

66% (1974)

65% (1972)

80% (1976)

0% (1977)

60% (1985)

65% (1980)

58% (1972)

66% (1975)

50% (1973)

0% (1974)

43% (1978)

60% (1975)

70% (1984)

70% (1986)

60% (1976)

0% (1974)