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przyrost naturalny
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różnica między liczbą urodzeń a liczbą zgonów
wzór na przyrost naturalny
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PN = U - Z
współczynnik przyrostu naturalnego
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Wspolczynnik PN = (PN: Liczba ludnosci) • 1000
Saldo Migracji
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SM = I - E
Przyrost rzeczywisty
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P Rz = PN + SM
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