76% (1972)

0% (1987)

52% (1983)

50% (1986)

47% (1978)

50% (1984)

0% (1982)

58% (1981)

60% (1986)

67% (1987)

0% (1978)

50% (1988)

55% (1990)

48% (1979)

34% (1989)

51% (1985)

74% (1982)

62% (1980)

0% (1982)

60% (1978)