I'm not sure why this measurement would matter very much. Insofar as I understand it, the amount of atmosphere doesn't adjust based on human population size, so

I'm not sure why this measurement would matter very much. Insofar as I understand it, the amount of atmosphere doesn't adjust based on human population size, so a per capita indicator isn't all that useful for most of the reasons one even bothers to keep track of carbon emissions in the first place.