78% (1995)

82% (1997)

76% (2001)

77% (1997)

81% (2005)

79% (2004)

73% (1999)

60% (1996)

53% (2003)

76% (2000)

77% (1999)

71% (1996)

72% (2002)

65% (2000)

70% (1996)

68% (2001)

68% (1996)

68% (1998)

82% (2001)

93% (2003)