37% (1998)

58% (1991)

42% (1997)

34% (1995)

32% (1994)

39% (1988)

32% (1993)

45% (1989)

24% (1993)

42% (1990)

25% (1994)

21% (1992)

30% (1994)

23% (1996)

27% (1991)

16% (2000)

0% (2002)

15% (1996)

0% (1999)

16% (1997)