78% (1995)

53% (2003)

82% (1997)

74% (2000)

76% (2001)

70% (1996)

81% (2005)

75% (1999)

74% (2001)

64% (1997)

81% (2001)

73% (2003)

66% (2000)

74% (1995)

77% (1997)

79% (2004)

72% (2002)

77% (1999)

68% (2001)

83% (2002)