47% (1964)

50% (1967)

63% (1964)

55% (1968)

50% (1972)

48% (1965)

70% (1962)

43% (1967)

43% (1969)

47% (1962)

43% (1967)

60% (1968)

30% (1965)

45% (1964)

50% (1966)

50% (1963)

38% (1967)

37% (1961)