24% (1987)

50% (1989)

43% (1983)

52% (1988)

60% (1986)

57% (1987)

43% (1984)

20% (1994)

32% (1991)

10% (1985)

54% (1985)

28% (1986)

53% (1986)

0% (1990)

62% (1988)

54% (1988)

45% (1985)

10% (1985)

20% (1985)

10% (1986)