70% (1987)

76% (1977)

62% (1970)

42% (1968)

46% (1963)

0% (1973)

52% (1957)

32% (1932)

58% (1973)

70% (1976)

69% (1985)

59% (1987)

62% (1958)

54% (1968)

40% (1965)

48% (1956)

62% (1968)

65% (1967)

60% (1979)

68% (1954)