53% (1978)

58% (1984)

65% (1968)

60% (1956)

42% (1988)

62% (1958)

49% (1968)

52% (1963)

47% (1974)

52% (1971)

58% (1970)

20% (1973)

43% (1975)

23% (1974)

53% (1976)

50% (1979)

35% (1961)

100% (1969)

30% (1971)

56% (1970)