37% (1949)

66% (1976)

30% (1974)

68% (1980)

67% (1976)

38% (1965)

42% (1959)

42% (1958)

30% (1986)

51% (1974)

54% (1972)

25% (1978)

71% (1977)

61% (1976)

52% (1948)

30% (1977)

58% (1937)

63% (1990)

65% (1964)

73% (1972)