58% (1976)

62% (1964)

53% (1963)

50% (1975)

50% (1962)

54% (1963)

48% (1967)

55% (1972)

40% (1983)

50% (1979)

41% (1976)

45% (1967)

50% (1971)

50% (1976)

50% (1965)

58% (1966)

55% (1968)

63% (1971)

49% (1968)

50% (1964)