53% (2003)

76% (2001)

78% (1995)

82% (1997)

72% (2002)

77% (1997)

78% (2004)

83% (2002)

74% (1999)

50% (1998)

82% (1999)

62% (1996)

65% (2000)

75% (1999)

69% (1996)

62% (1996)

72% (2000)

74% (2001)

69% (2001)

80% (2005)