62% (1960)

51% (1960)

61% (1964)

60% (1960)

50% (1957)

54% (1965)

58% (1964)

40% (1961)

55% (1958)

50% (1962)

53% (1962)

50% (1957)

56% (1957)

64% (1967)

60% (1965)

53% (1963)

59% (1965)

52% (1957)

56% (1965)

50% (1964)