77% (1977)

69% (1975)

65% (1986)

70% (1993)

33% (1974)

100% (1966)

65% (1983)

70% (1984)

70% (1978)

90% (1986)

50% (1977)

95% (1984)

70% (1983)

73% (1984)

0% (1975)

68% (1973)

65% (1984)

0% (1983)

75% (1989)

75% (1980)