73% (1964)

63% (1968)

81% (1960)

77% (1966)

65% (1963)

80% (1957)

74% (1951)

43% (1973)

62% (1968)

58% (1969)

56% (1964)

58% (1964)

74% (1963)

10% (1960)

56% (1956)

40% (1958)

58% (1958)

40% (1969)

66% (1956)

31% (1958)