74% (2000)

73% (2003)

79% (2000)

65% (2002)

58% (2003)

50% (2001)

66% (2003)

61% (2002)

62% (2001)

72% (2001)

66% (1999)

56% (2002)

66% (2001)

60% (1999)

60% (2002)

63% (2003)

68% (1998)

51% (1999)

59% (2004)

66% (1999)