82% (1963)

76% (1952)

70% (1960)

63% (1955)

73% (1953)

67% (1961)

71% (1957)

63% (1949)

62% (1961)

60% (1958)

64% (1954)

40% (1955)

62% (1955)

52% (1962)

70% (1956)

53% (1954)

45% (1951)

74% (1959)

75% (1954)

61% (1957)