56% (1958)

56% (1956)

50% (1957)

40% (1961)

55% (1958)

62% (1960)

58% (1964)

50% (1959)

64% (1967)

51% (1960)

53% (1962)

50% (1962)

54% (1965)

53% (1963)

60% (1960)

52% (1957)

55% (1957)

50% (1957)

59% (1965)

50% (1964)