45% (2001)

72% (2005)

68% (1999)

66% (2006)

62% (2001)

51% (1998)

66% (1999)

76% (2002)

61% (2003)

74% (2005)

61% (2002)

61% (2000)

52% (2002)

68% (2003)

66% (2002)

61% (2002)

62% (2002)

53% (1998)

68% (1997)

58% (2000)