66% (1970)

73% (1986)

68% (1983)

0% (1980)

81% (1974)

83% (1980)

0% (1973)

0% (1981)

82% (1975)

60% (1978)

80% (1977)

80% (1984)

74% (1984)

73% (1976)

62% (1985)

45% (1979)

10% (1984)

82% (1975)

77% (1983)

0% (1986)