54% (1962)

51% (1980)

61% (1969)

41% (1974)

64% (1959)

63% (1956)

50% (1974)

66% (1936)

59% (1963)

58% (1948)

33% (1982)

68% (1968)

58% (1940)

64% (1957)

58% (1957)

50% (1945)

50% (1965)

36% (1979)

62% (1940)

57% (1956)