53% (2012)

79% (1975)

65% (2001)

58% (1997)

70% (1974)

70% (1988)

65% (1989)

67% (1976)

73% (1972)

56% (2009)

77% (1941)

76% (1955)

58% (2004)

65% (1983)

62% (1997)

55% (1987)

58% (2004)

62% (1986)

68% (2001)

63% (2012)