68% (2000)

56% (1998)

55% (2007)

39% (2002)

27% (2003)

70% (1998)

18% (2005)

63% (1999)

29% (2008)

10% (2004)

44% (2004)

64% (2006)

53% (2000)

58% (2006)

52% (2005)

54% (2004)

50% (2005)

43% (2004)

60% (1998)

65% (1998)