59% (1958)

55% (1964)

62% (1963)

60% (1963)

54% (1957)

64% (1965)

50% (1959)

54% (1958)

42% (1962)

37% (1961)

54% (1958)

50% (1957)

50% (1959)

31% (1962)

55% (1960)

48% (1961)

33% (1962)

67% (1960)

62% (1961)

55% (1961)