69% (2007)

52% (2000)

63% (1979)

59% (1975)

54% (2009)

57% (2003)

68% (1970)

66% (1949)

61% (2007)

65% (2002)

61% (1994)

65% (1966)

66% (2015)

74% (1939)

65% (1964)

54% (1933)

52% (1999)

43% (2012)

90% (2007)

59% (1980)