77% (2003)

60% (1969)

84% (1987)

76% (1966)

83% (2005)

69% (1990)

72% (1976)

67% (1969)

71% (1993)

77% (1993)

79% (1993)

71% (1994)

78% (1995)

82% (1998)

76% (2001)

81% (2005)

78% (1996)

81% (1966)

77% (1985)

73% (1982)