78% (1995)

82% (1997)

81% (2005)

76% (2001)

69% (1998)

62% (1996)

72% (1999)

74% (2000)

78% (2004)

68% (1996)

71% (1996)

77% (1997)

52% (2003)

82% (1999)

72% (2002)

71% (1996)

20% (1991)

81% (2001)

95% (2005)

64% (1997)