73% (1952)

72% (1964)

77% (1963)

63% (1958)

60% (1947)

64% (1959)

58% (1966)

51% (1966)

62% (1955)

53% (1967)

66% (1939)

38% (1950)

40% (1965)

50% (1966)

50% (1945)

41% (1954)

20% (1968)

61% (1950)

0% (1951)

37% (1958)