84% (2005)

83% (2005)

69% (2001)

79% (2004)

55% (2003)

80% (2002)

76% (1985)

68% (2002)

81% (2005)

74% (1991)

68% (1999)

62% (2006)

61% (1990)

81% (2001)

71% (2006)

62% (1994)

64% (2006)

83% (1993)

58% (1988)

71% (1995)