77% (1977)

69% (1975)

70% (1993)

70% (1984)

70% (1978)

65% (1986)

65% (1983)

50% (1977)

68% (1973)

100% (1966)

70% (1983)

0% (1975)

33% (1974)

73% (1984)

90% (1986)

75% (1980)

75% (1989)

95% (1984)

65% (1984)

71% (1982)