73% (1978)

69% (1967)

64% (1988)

60% (1980)

84% (1989)

70% (1987)

0% (1973)

80% (1987)

68% (1983)

68% (1984)

50% (1982)

60% (1986)

70% (1980)

0% (1989)

50% (1984)

20% (1982)

20% (1984)

0% (1987)

70% (1983)

50% (1989)