0% (1970)

0% (1984)

69% (1986)

0% (1992)

60% (1980)

0% (1989)

0% (1973)

0% (1980)

34% (1986)

63% (1971)

60% (1972)

46% (1981)

0% (1968)

70% (1975)

71% (1986)

80% (1986)

80% (1986)

45% (1980)

74% (1981)

52% (1982)