69% (1953)

61% (2002)

60% (1932)

70% (1981)

54% (1997)

70% (1942)

58% (1983)

71% (1979)

56% (2006)

49% (1992)

68% (1998)

60% (1976)

65% (1998)

64% (2008)

66% (1988)

69% (1933)

66% (1957)

50% (1993)

60% (2001)

62% (2011)