65% (1992)

66% (1949)

71% (1976)

65% (1981)

71% (1968)

58% (2007)

60% (1990)

66% (1965)

59% (1961)

59% (1921)

60% (1991)

61% (1994)

64% (1958)

60% (1986)

69% (1981)

61% (1956)

56% (2012)

68% (1966)

61% (1994)

58% (2004)