64% (2009)

76% (1997)

74% (1993)

77% (1997)

77% (1998)

71% (1991)

78% (1995)

69% (1994)

76% (1996)

63% (1993)

71% (1997)

65% (1993)

57% (2004)

64% (2010)

69% (1995)

57% (1994)

74% (1994)

49% (1994)

62% (1996)

58% (1995)