Page 59 - môc lôc

D: Total number of deaths in the reference period;
P tb: Average population in the reference period.

Growth rate of population (growth rate) reflects the increase/decrease
of the population in reference period due to natural increase and net-migration.

Growth rate of population is expressed as a percentage or per mille.
In-migration rate are the number of people from different territorial
units (out-migration place) in-migrate to a territorial unit in the reference
period (usually a calendar year) on an average per 1,000 population of that
territorial unit (in-migration place).

Formula:

I
IR (‰) = × 1000
P tb
Where:

IR: In-migration rate;

I: Number of in-migrants in 12 months prior to the reference period;

P tb: Average population in the reference period.

Out-migration rate reflects the number out-migrants of a
territorial unit in the reference period on average per 1,000 population
of that territorial unit.

Formula:
O
OR (‰) = × 1000
P tb

Where:
OR: Out-migration rate;

O: Number of out-migrants in 12 months prior to the reference period;

P tb: Population up to the reference time-point.

Net-migration rate reflects the status of in-migration and out-
migration of population into/out from a territorial unit in the reference

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