40% (1994)

56% (1997)

43% (1994)

25% (1996)

41% (1994)

44% (1995)

30% (1995)

40% (1995)

52% (1993)

0% (1995)

0% (1996)

55% (1993)

58% (1996)

10% (1998)

40% (1995)

20% (1995)

0% (1997)

90% (1996)

30% (1997)

0% (1998)