64% (1976)

43% (1978)

80% (1980)

0% (1974)

64% (1974)

49% (1973)

58% (1972)

58% (1972)

65% (1972)

66% (1975)

60% (1975)

0% (1980)

80% (1976)

0% (1973)

80% (1978)

60% (1976)

42% (1979)

60% (1975)

60% (1985)

70% (1984)