45% (1973)

70% (1978)

52% (1975)

50% (1979)

44% (1983)

50% (1963)

50% (1957)

52% (1966)

53% (1963)

50% (1970)

55% (1972)

50% (1966)

67% (1977)

50% (1962)

38% (1966)

58% (1966)

51% (1967)

50% (1971)

44% (1965)

55% (1970)