65% (1974)

48% (1957)

48% (1962)

53% (1970)

40% (1979)

32% (1958)

39% (1956)

36% (1958)

51% (1974)

55% (1966)

65% (1963)

56% (1964)

37% (1955)

60% (1963)

59% (1976)

39% (1958)

47% (1955)

52% (1960)

56% (1973)

38% (1960)