70% (1951)

35% (1976)

47% (1958)

64% (1952)

38% (1951)

64% (1970)

55% (1969)

69% (1968)

60% (1956)

30% (1953)

55% (1956)

68% (1962)

40% (1971)

20% (1958)

38% (1957)

65% (1957)

52% (1955)

40% (1957)

0% (1951)

30% (1958)