Table 3.

Size surveys from countries

	UK	USA		Japan			Korea
Survey year	2001 to 2002	2002 to 2003	2007 to 2008	2004 to 2006	2010	2011	2003 to 2004	2010 to 2013
Organization	3DEC Center	TC2	NHNES	HQL			KATS	KATS
Samples (N)	11,000	12,000	9,700	6,700	109	149	5,168	4,400
Age range (years)	Over 16 years adults	Adults	All ages	18 to 90	20 to 58	Foreigners living in Japan	8 to 75	7 to 69
Methods	−1D	−3D	−1D	−1D	−1D		−1D	−1D
	−3D			−3D			−3D	−3D