68% (2002)

69% (1998)

74% (2004)

47% (2002)

70% (1999)

58% (2005)

60% (2000)

60% (2003)

63% (2004)

20% (2007)

62% (2005)

50% (2006)

64% (2005)

48% (1999)

52% (1997)

57% (1996)

72% (1997)

47% (2007)

60% (2003)

27% (2004)