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IR =
I
× 1000
P
Where:
IR: In-migration rate;
I: Number of in-migrants in the reference period;
P: Population up to the reference time-point.
Out-migration rate
reflects the number out-migrants of a territorial unit in
the reference period on average per 1000 population of that territorial unit.
OR =
O
× 1000
P
Where:
OR: Out-migration rate;
O: Number of out-migrants in the reference period;
P: 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 period. It is the
difference between number of in-migrants and number of out-migrants of a
territorial unit on average per 1000 population of that territorial unit.
NR =
I - O
× 1000
P
Where:
NR: Net-migration rate;
I: Number of in-migrants in the reference period;
O: Number of out-migrants in the reference period;
P: Population up to the reference time-point.
Or: NR = IR - OR
Where:
NR: Net-migration rate;
IR: In-migration rate;
OR: Out-migration rate.
Data on In-migration rate, Out-migration rate and Net-migration rate of the
whole Country, 06 socio-economic regions and 63 provinces/cities under the
Central is only calculated for internal migration (not including international
migration).
Life expectancy at birth
reflects the prospect of a newborn could live for