71% (1952)

62% (2004)

55% (1993)

59% (2007)

44% (1999)

56% (1991)

53% (1986)

69% (2002)

74% (1939)

70% (1979)

66% (1935)

66% (1945)

64% (1951)

66% (2002)

55% (2007)

53% (2006)

45% (1996)

68% (1963)

0% (1970)

70% (1951)