38% (1963)

59% (1963)

39% (1958)

51% (1974)

52% (1978)

47% (1970)

56% (1958)

57% (1957)

61% (1972)

53% (1977)

58% (1974)

54% (1978)

49% (1966)

80% (1964)

47% (1955)

59% (1976)

59% (1959)

48% (1956)

62% (1978)

47% (1976)