83% (2005)

80% (1993)

82% (2001)

72% (2008)

82% (1998)

69% (1999)

79% (2000)

79% (1999)

78% (2003)

82% (1997)

71% (2002)

74% (1998)

82% (2002)

78% (1996)

79% (2002)

78% (1997)

81% (2000)

76% (2002)

72% (1994)

82% (2000)