46% (1962)

62% (1967)

50% (1956)

29% (1958)

48% (1986)

52% (1964)

43% (1957)

50% (1962)

50% (1962)

45% (1964)

40% (1957)

49% (1953)

50% (1946)

53% (1967)

66% (1951)

54% (1956)

55% (1957)

56% (1959)

69% (1976)

40% (1990)