38% (1989)

37% (1988)

62% (1987)

30% (1987)

38% (1985)

35% (1985)

45% (1988)

5% (1995)

50% (1985)

70% (1984)

52% (1983)

10% (1989)

66% (1986)

20% (1984)

0% (1981)

0% (1985)

20% (1998)