List of Radon Level by Country (Please send comments and corrections to: Jan_Zielinski@hc-sc.gc.ca)
Country Name	WHO Code	ISO	Population 10^{6 a}	AM	GM	GSD	Max	Classification of AM^b	Source	OriginalReference for AM, possibly GM, GSD, Max
Australia	5020	AUS	21.05	11	8	2.1	420		UNSCEAR 2000 report	Langroo, M. K.; Wise, K. N.; Duggleby, J. C., and Kotler, L. H. A Nation-Wide Survey of Radon and Gamma Radiation Levels in Australian Homes. ARL/TR090. ISSN 0157-1400, April 1990. ; and Langroo, M. K.; Wise, K. N.; Duggleby, J. C., and Kotler, L. H. A nationwide survey of 222Rn and gamma radiation levels in Australian homes. Health Physics . 1991 Dec; 61(6):753-761..
New Zealand	5150	NZL	4.03	21.5	19.5		80	CWA	UNSCEAR 2001 survey
^a Data are estimates for July 2005, taken from the United Nations World Populations Prospects Report (2004 revision).
^b CWA - Country Wide Average; RA - Regional Average.