47% (1966)

45% (1962)

63% (1966)

58% (1976)

54% (1974)

49% (1967)

53% (1965)

37% (1963)

50% (1970)

46% (1962)

58% (1966)

50% (1992)

49% (1976)

50% (1963)

45% (1967)

59% (1977)

63% (1966)

0% (1951)

50% (1979)

68% (1967)