50% (1954)

50% (1953)

35% (1976)

69% (1968)

70% (1951)

55% (1969)

40% (1971)

0% (1960)

50% (1956)

64% (1970)

60% (1965)

50% (1958)

70% (1956)

74% (1961)

63% (1952)

57% (1959)

67% (1962)

37% (1953)

30% (1957)

52% (1955)