50% (1986)

70% (1977)

50% (1985)

0% (1980)

0% (1981)

0% (1977)

33% (1980)

47% (1980)

0% (1977)

0% (1980)

0% (1980)

0% (1980)

0% (1976)

50% (1977)

60% (1980)

0% (1974)

0% (1988)