62% (1997)

36% (1995)

20% (1996)

41% (1995)

49% (1994)

40% (1994)

43% (1994)

52% (1993)

0% (1995)

55% (1993)

50% (1996)

0% (1996)

58% (1996)

50% (1996)

20% (1995)

30% (1995)

10% (1998)

20% (1995)

0% (1999)

40% (1995)