72% (1958)

40% (1951)

58% (1970)

43% (1953)

67% (1959)

61% (1957)

57% (1964)

58% (1962)

65% (1957)

63% (1960)

70% (1951)

70% (1956)

64% (1962)

52% (1953)

40% (1955)

62% (1955)

46% (1972)

53% (1954)

40% (1958)

60% (1972)