Maximum Population of the Balkans

What could be the maximum population of the following countries in the Balkans: Serbia, Bulgaria, Greece, Albania, Macedonia, Romania, Montenegro and Bosnia?

I assume the population transfers, massacres and population expulsions of the Muslim population would have to be avoided. Also, i assume some of the wars in the Balkans have to be avoided as well.
 

Angel Heart

Banned
If Serbia had the same population density as her southern province Kosovo for example I think we could have a population of around 14 million or 20 million if we use Germany's population density. 20 million should be the maximum Serbia could support. How to achieve this is another question.
 
If Serbia had the same population density as her southern province Kosovo for example I think we could have a population of around 14 million or 20 million if we use Germany's population density. 20 million should be the maximun Serbia could support. How to achieve this is another question.

That is interesting... But could've that been achieved by now?

Also, what about the rest?
 
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