62% (1937)

37% (1956)

70% (1976)

60% (1985)

52% (1964)

47% (1973)

55% (1941)

46% (1975)

54% (1970)

55% (1930)

60% (1943)

57% (1956)

50% (1954)

62% (1925)

62% (1957)

50% (1974)

51% (1997)

53% (1945)

49% (1977)

41% (1974)