69% (1978)

66% (1971)

78% (1947)

55% (2000)

56% (1984)

76% (1978)

65% (1935)

65% (1958)

69% (1937)

72% (1963)

67% (1974)

71% (2001)

63% (1949)

63% (1966)

54% (1976)

70% (1980)

63% (1989)

62% (2002)

66% (1977)

70% (1958)