10% (1987)

32% (1991)

50% (1989)

10% (1985)

43% (1984)

52% (1988)

60% (1986)

0% (1984)

20% (1994)

43% (1987)

59% (1987)

0% (1990)

55% (1985)

55% (1986)

53% (1986)

20% (1979)

50% (1986)

47% (1987)

43% (1983)

33% (1986)