56% (1979)

57% (1976)

68% (1959)

67% (1958)

70% (1964)

57% (1988)

67% (1995)

52% (1946)

72% (1956)

55% (1958)

65% (1996)

67% (1949)

63% (1949)

36% (1979)

58% (1966)

61% (1978)

66% (1972)

66% (1945)

63% (1953)

69% (1920)