52% (1932)

60% (1999)

65% (1950)

71% (1957)

68% (1973)

71% (1939)

69% (2002)

69% (1958)

64% (1973)

61% (1945)

56% (1984)

56% (1985)

60% (1996)

63% (1955)

66% (1977)

66% (1949)

66% (2002)

68% (1936)

69% (1948)

67% (1933)