64% (1976)

58% (1972)

66% (1974)

65% (1972)

58% (1972)

49% (1973)

70% (1986)

60% (1985)

50% (1973)

80% (1976)

56% (1974)

80% (1978)

0% (1977)

60% (1975)

65% (1980)

0% (1974)

55% (1974)

80% (1980)

66% (1975)

60% (1976)