66% (1974)

64% (1976)

66% (1972)

58% (1972)

66% (1975)

49% (1973)

60% (1976)

60% (1975)

80% (1976)

0% (1977)

50% (1973)

58% (1972)

80% (1980)

70% (1986)

56% (1974)

0% (1980)

43% (1978)

42% (1979)

65% (1980)

0% (1974)