71% (1985)

63% (1986)

65% (1977)

60% (1984)

74% (1965)

70% (1957)

69% (1991)

55% (1972)

58% (1989)

62% (1958)

46% (1987)

50% (1956)

85% (1973)

71% (1977)

72% (1984)

43% (1976)

47% (1986)

68% (1926)

70% (1982)

30% (1974)