53% (1978)

70% (1968)

55% (1970)

35% (1961)

62% (1958)

51% (1971)

60% (1956)

58% (1951)

58% (1984)

50% (1979)

35% (1972)

10% (1958)

52% (1963)

50% (1959)

58% (1972)

53% (1976)

48% (1968)

50% (1955)

20% (1973)

23% (1974)