48% (1969)

63% (1963)

60% (1966)

53% (1979)

70% (1962)

48% (1973)

69% (1961)

38% (1982)

50% (1949)

55% (1950)

59% (1981)

54% (1955)

52% (1956)

50% (1957)

50% (1971)

50% (1980)

45% (1972)

50% (1973)

52% (1958)

53% (1979)