58% (2010)

63% (1986)

62% (1949)

63% (1964)

65% (1935)

72% (2008)

58% (1953)

61% (1975)

56% (1994)

57% (1994)

57% (1952)

73% (1982)

65% (1951)

58% (2004)

59% (1964)

58% (1966)

48% (1983)

72% (1953)

65% (1962)

52% (1953)