34% (1979)

52% (1980)

0% (1983)

70% (1974)

57% (1979)

54% (1985)

62% (1984)

66% (1981)

68% (1975)

0% (1982)

48% (1977)

71% (1983)

0% (1978)

0% (1986)

45% (1980)

60% (1984)

100% (1984)

30% (1980)

64% (1986)

40% (1986)