50% (1977)

70% (1983)

69% (1975)

76% (1977)

33% (1974)

95% (1984)

70% (1985)

67% (1973)

76% (1980)

65% (1983)

90% (1986)

70% (1984)

75% (1989)

0% (1983)

71% (1982)

70% (1978)

47% (1974)

70% (1993)

66% (1986)

100% (1966)