75% (1977)

64% (1973)

55% (1985)

64% (1987)

68% (1981)

68% (1978)

67% (1985)

55% (1974)

70% (1981)

45% (1987)

50% (1984)

65% (1972)

60% (1982)

33% (1980)

57% (1978)

52% (1975)

62% (1986)

36% (1983)

0% (1978)

50% (1977)