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Reference.org
Net migration rate
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<p>The net migration rate is the difference between the number of <a href="/facts/Immigrant/8vNxfBhT">immigrants</a> (people coming into an area) and the number of <a href="/facts/Emigrant/TINd6wC0">emigrants</a> (people leaving an area) per year divided by the population. When the number of immigrants is larger than the number of emigrants, a positive net migration rate occurs. A positive net migration rate indicates that there are more people entering than leaving an area. When more emigrate from a country, the result is a negative net migration rate, meaning that more people are leaving than entering the area. When there is an equal number of immigrants and emigrants, the net migration rate is balanced. </p><p>The net migration rate is calculated over a one-year period using the mid year population and a <a href="/facts/Ratio/mFmhQt7T">ratio</a>. </p>