Net migration rate is the difference of immigrants & emigrants of an area in a period of time, divided per 1,000 inhabitants. A positive value represents more people entering the country than leaving it, while a negative value means more people leaving than entering it, and net neutral immigration would mean keeping a number of people leaving and entering equally.
Net migration rate by country (2016)

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Alex E

“Maps are like campfires – everyone gathers around them, because they allow people to understand complex issues at a glance, and find agreement about how to help the land.”