77% (1963)

71% (1964)

73% (1952)

62% (1958)

60% (1947)

58% (1966)

65% (1959)

50% (1966)

40% (1965)

30% (1964)

66% (1939)

41% (1954)

61% (1955)

51% (1966)

60% (1949)

61% (1950)

38% (1950)

53% (1967)

0% (1947)

37% (1958)