67% (2011)

67% (1952)

50% (1963)

72% (1998)

73% (1979)

65% (1985)

60% (1960)

74% (1988)

74% (1977)

79% (2007)

70% (1977)

66% (2003)

75% (1967)

72% (1976)

74% (2001)

66% (1985)

78% (1996)

78% (1983)

78% (1995)

76% (1966)