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Under five mortality rate is the measure of mortality level of children in
the first five years of life. This rate is defined as the number of deaths of
children under age 5 per 1,000 live births in the reference period on average.

D
U 5 MR  5 0  1000
B
Where:

U5MR: Under five mortality rate;

5D 0 : Number of deaths under age 5 in the reference period;

B: Total of live births in the reference period.
Natural increase rate of population is the difference between number of
live births and number of deaths to the population in the reference period. The
natural increase rate of population is expressed as a percentage or per mille.

Formula:
B - D
NIR = × 1000
P tb

Where:

NIR: Natural Increase Rate of population;
B: Total number of live births in the reference period;

D: Total number of deaths in the reference period;

Ptb: 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

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