76% (1961)

60% (1973)

0% (1951)

58% (1959)

63% (1952)

45% (1953)

60% (1958)

38% (1957)

30% (1953)

45% (1953)

53% (1954)

43% (1956)

75% (1954)

52% (1950)

53% (1955)

30% (1958)

60% (1963)

40% (1957)

55% (1956)

40% (1956)