57% (1968)

62% (1980)

66% (1950)

55% (1966)

58% (1960)

31% (2002)

61% (1927)

61% (1951)

65% (1996)

62% (1960)

68% (1936)

52% (1999)

68% (1930)

69% (1950)

65% (1943)

61% (1930)

70% (1927)

65% (1952)

60% (1934)

52% (1986)