69% (2006)

62% (1958)

60% (2004)

67% (1965)

62% (1994)

55% (1987)

65% (1996)

63% (2005)

71% (1945)

55% (1982)

59% (1996)

71% (2008)

70% (1944)

54% (2006)

59% (1991)

56% (2004)

45% (1989)

63% (1936)

68% (1945)

62% (2005)