79% (2001)

73% (2001)

77% (1999)

71% (1992)

74% (1997)

71% (1994)

66% (2002)

56% (2001)

65% (2000)

72% (1996)

69% (1995)

58% (2000)

68% (2000)

58% (2000)

55% (1994)

72% (2004)

71% (1992)

69% (1998)

68% (1995)

55% (2002)