35% (1976)

64% (1970)

74% (1961)

50% (1954)

50% (1958)

70% (1956)

50% (1952)

70% (1951)

40% (1956)

55% (1969)

50% (1955)

63% (1952)

37% (1953)

40% (1971)

40% (1954)

40% (1979)

23% (1952)

67% (1962)

63% (1957)

0% (1958)