76% (1964)

60% (1955)

69% (1964)

55% (1965)

76% (1960)

71% (1962)

75% (1962)

63% (1963)

59% (1966)

62% (1960)

45% (1953)

90% (1961)

64% (1964)

69% (1951)

65% (1960)

60% (1965)

51% (1965)

45% (1961)

56% (1963)

55% (1960)