International Incidence of CGE

The reported incidence in Pennsylvania with a population roughly similar to London from their website:

(These are numbers of ALL air/gas embolism, not only those involving the cerebral circulation)

http://patientsafetyauthority.org/ADVISORIES/AdvisoryLibrary/2012/Jun;9%282%29/Pages/58.aspx

French, Australian and UK figures, from existing publications, with the population of the drainage area:

These are 2002-2012 data.