62% (1953)

52% (1971)

60% (1937)

54% (1963)

56% (1941)

58% (1973)

40% (1965)

59% (1974)

65% (1955)

50% (1938)

35% (1932)

50% (1986)

42% (1975)

55% (1965)

53% (1950)

55% (1971)

29% (1975)

56% (1969)

44% (1958)

60% (1970)