72% (2011)

59% (2011)

76% (2009)

71% (2006)

63% (1977)

82% (1999)

75% (1989)

68% (1952)

69% (2001)

79% (1988)

74% (2011)

77% (2013)

86% (2004)

45% (1997)

81% (2005)

81% (1993)

56% (1950)

54% (2006)

68% (1962)

81% (2010)