50% (1993)

65% (1986)

0% (1989)

0% (1975)

43% (1983)

64% (1993)

40% (1979)

50% (1985)

20% (1980)

50% (1977)

35% (1987)

0% (1978)

0% (1980)

41% (1975)

63% (1977)

0% (1988)

0% (1977)

55% (1977)

0% (1978)

56% (1985)