42% (2001)

72% (2005)

69% (1999)

65% (2006)

66% (1999)

62% (2002)

62% (2001)

51% (1998)

61% (2000)

52% (2002)

65% (2007)

76% (2002)

45% (2000)

68% (2001)

62% (2003)

61% (2002)

49% (1999)

68% (1997)

67% (2002)

55% (2001)