77% (1977)

69% (1975)

70% (1978)

70% (1984)

65% (1983)

65% (1986)

68% (1973)

50% (1977)

0% (1975)

65% (1984)

75% (1989)

95% (1984)

70% (1993)

90% (1986)

100% (1966)

33% (1974)

73% (1984)

71% (1982)

0% (1983)

70% (1983)