68% (1966)

54% (1953)

52% (1962)

61% (1928)

64% (1957)

66% (1939)

62% (1940)

61% (1954)

62% (1960)

60% (1941)

64% (1943)

68% (1932)

40% (1972)

62% (1951)

62% (1949)

66% (1948)

64% (1949)

65% (1929)

40% (1975)

58% (1980)