78% (1995)

81% (1997)

53% (2003)

76% (2001)

79% (2004)

81% (2005)

78% (1997)

71% (1996)

72% (2000)

75% (1999)

71% (1996)

78% (1999)

72% (2002)

80% (2001)

70% (2001)

91% (2003)

66% (2000)

73% (2003)

68% (1998)

83% (2002)