57% (1979)

34% (1979)

65% (1981)

62% (1984)

64% (1986)

71% (1983)

0% (1983)

60% (1984)

100% (1984)

0% (1982)

52% (1980)

68% (1975)

80% (1979)

54% (1985)

40% (1986)

50% (1981)

48% (1977)

55% (1982)

0% (1975)

45% (1980)