58% (1984)

52% (1963)

20% (1973)

53% (1978)

50% (1979)

52% (1971)

60% (1956)

62% (1958)

50% (1979)

58% (1951)

47% (1974)

53% (1976)

35% (1961)

70% (1968)

56% (1970)

35% (1972)

42% (1988)

58% (1951)

10% (1958)

48% (1968)