70% (1952)

50% (1959)

43% (1973)

57% (1967)

50% (1958)

69% (1966)

58% (1966)

51% (1963)

50% (1959)

57% (1970)

54% (1966)

59% (1977)

58% (1952)

50% (1971)

55% (1954)

59% (1958)