69% (1967)

73% (1978)

85% (1979)

0% (1978)

68% (1984)

84% (1989)

40% (1986)

50% (1982)

48% (1981)

50% (1989)

70% (1980)

80% (1987)

0% (1982)

0% (1985)

60% (1987)

50% (1985)

0% (1972)

50% (1984)

64% (1988)

0% (1980)