75% (1963)

72% (1964)

63% (1958)

74% (1952)

56% (1966)

64% (1959)

60% (1947)

63% (1950)

53% (1967)

51% (1966)

62% (1955)

41% (1954)

38% (1950)

30% (1964)

66% (1939)

40% (1965)

50% (1966)

0% (1949)

65% (1960)

20% (1968)