18% (1996)

38% (1998)

72% (1997)

31% (2003)

45% (1996)

46% (1997)

47% (1998)

46% (1998)

37% (1996)

23% (1998)

58% (1998)

57% (1998)

50% (1999)

33% (1997)

54% (1997)

47% (1999)

40% (1998)

15% (1995)

10% (1997)

60% (1999)