67% (1956)

58% (1963)

62% (1964)

65% (1976)

61% (1974)

46% (1976)

59% (1964)

48% (1962)

63% (1956)

0% (1949)

60% (1970)

50% (1954)

72% (1964)

53% (1954)

72% (1957)

45% (1959)

38% (1957)

63% (1959)

64% (1955)

71% (1965)