50% (1981)

0% (1977)

35% (1974)

0% (1984)

0% (1972)

0% (1976)

58% (1979)

40% (1973)

0% (1972)

52% (1979)

0% (1984)

57% (1983)

0% (1974)

50% (1977)

70% (1982)

0% (1986)

51% (1985)

0% (1972)

0% (1976)

47% (1985)