61% (1996)

85% (2008)

27% (2004)

20% (1998)

0% (2009)

48% (2003)

40% (2002)

64% (2003)

32% (2002)

47% (2001)

38% (2003)

35% (2002)

44% (2002)

35% (2000)

57% (2002)

45% (1999)

82% (2000)

41% (2002)

58% (2000)

59% (2003)