English: This bubble map shows the global distribution of walnut output in 2005 as a percentage of the top producer (China - 499,070 tonnes).

This map is consistent with incomplete set of data too as long as the top producer is known. It resolves the accessibility issues faced by colour-coded maps that may not be properly rendered in old computer screens.

Data was extracted on 14th June 2007 from http://faostat.fao.org/site/336/DesktopDefault.aspx?PageID=336

Based on :Image:BlankMap-World.png

California walnuts account for 99% of the commercial US supply and two-thirds of the world export market. Source: http://www.walnuts.org/pdfs/WalnutIndustryFactSheet_November2007.pdf China produces more walnuts, but they are mainly for its domestic market. Source: http://www.agmrc.org/commodities__products/nuts/english_walnuts_profile.cfm