43% (1989)

16% (1997)

39% (1998)

42% (1997)

30% (1998)

27% (1994)

37% (1988)

32% (1995)

0% (1991)

22% (1992)

26% (1994)

23% (1993)

41% (1994)

25% (1991)

14% (1996)

0% (1995)

40% (1990)

0% (1999)

33% (1990)

18% (2000)