73% (1964)

65% (1963)

58% (1969)

81% (1960)

63% (1968)

74% (1951)

80% (1957)

60% (1954)

66% (1956)

77% (1966)

62% (1949)

10% (1960)

55% (1962)

43% (1973)

56% (1956)

53% (1964)

62% (1968)

31% (1958)

58% (1958)

56% (1964)