10% (1986)

60% (1990)

10% (1985)

43% (1983)

20% (1991)

47% (1988)

50% (1989)

20% (1985)

35% (1994)

0% (1987)

60% (1986)

50% (1985)

20% (1993)

20% (1990)

20% (1987)

47% (1987)

20% (1985)

57% (1992)

25% (1989)

25% (1985)