53% (1996)

70% (1939)

59% (2000)

69% (1960)

55% (1981)

63% (1938)

58% (1975)

58% (1994)

53% (1949)

62% (1956)

61% (1971)

70% (1958)

54% (1955)

66% (1949)

68% (1978)

57% (1955)

67% (1932)

61% (1964)

57% (1959)

68% (1959)