Has there been any informed work done, to your knowledge, to provide a sound estimate of what percentage of the human population lived as hunter-gatherers in the medieval period?

It appears clear that people living in agricultural/civilized/pastoralist societies were a majority, but what about people doing things the old way? What were their absolute numbers like.

I'm having a conversation elsewhere about this and the other person is very confident that no more than 3% could possibly have lived in this fashion, in that period.

It appears to me that Eurasia, in general, had very few zones where immediate-return foraging would have been viable in the medieval era. So whatever the global population of foragers was, it seems to me that it was probably concentrated in the heavily forested areas of South America, Africa and south Asia/Indonesia.

To reiterate, I'm looking for informed estimates of numbers, and good estimates of what proportion of overall humanity they represented.

I'm looking for published research on this question, if any exists. If none does, then I'll be happy with your original research.