31% (1992)

48% (1992)

27% (1991)

45% (1996)

38% (1993)

37% (1997)

60% (2002)

41% (2001)

36% (2002)

62% (1999)

53% (2000)

45% (1993)

51% (1998)

24% (2002)

52% (1996)

15% (1991)

30% (1997)

53% (2000)

0% (1998)