People who believe they are financially secure may move from regions which are considered “wealthy” to regions which are seen to be “poorer” (and cheaper). This outflow can influence this data.
https://worldpopulationreview.com/country-rankings/american-...
> This outflow can influence this data
Influence how? Migrations from wealthy to poor regions are still migrations, no?
They are... but the interpretation is different. They aren't looking for opportunity, at least not in the normal sense. And they aren't fleeing oppression in the normal sense either.