64% (1976)

43% (1978)

80% (1980)

58% (1972)

64% (1974)

0% (1973)

58% (1972)

0% (1974)

66% (1975)

0% (1980)

70% (1986)

70% (1984)

80% (1976)

65% (1972)

60% (1976)

0% (1974)

56% (1974)

60% (1975)

42% (1979)

0% (1977)