60% (1978)

64% (1987)

0% (1979)

45% (1984)

43% (1984)

62% (1989)

71% (1981)

65% (1989)

52% (1976)

48% (1976)

63% (1982)

41% (1990)

0% (1977)

0% (1977)

58% (1987)

83% (1979)

60% (1980)

80% (1980)

67% (1987)

57% (1986)