85% (1975)

60% (1976)

64% (1970)

100% (1973)

0% (1978)

0% (1977)

70% (1973)

78% (1980)

70% (1974)

0% (1973)

80% (1975)

0% (1976)

0% (1974)

88% (1974)

0% (1981)

60% (1973)

50% (1970)

0% (1973)

0% (1976)

50% (1974)