50% (1968)

57% (1968)

50% (1972)

0% (1954)

56% (1969)

50% (1959)

0% (1965)

50% (1964)

50% (1966)

65% (1967)

68% (1969)

33% (1971)

52% (1970)

61% (1962)

53% (1972)

62% (1966)

69% (1969)

63% (1973)

0% (1951)

59% (1967)