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Population (persons)
Population density =
2
(persons/km )
2
Territorial area (km )
Sex ratio of the population reflects number of males per 100

females. Sex ratio of the population is determined by the following
formula:

Total of males
Sex ratio
of the population = × 100
Total of females

Crude birth rate: The indicator measures the fertility of the
population, is one of the two components of natural population
increase. High or low value of crude birth rate can affect the size,

structure and population growth rate. Crude birth rate indicates that
for every 1000 people, how many live births are in the reference
period.

B
CBR =  1000
P

Where:

CBR: Crude birth rate

B: Total live births in the reference period;

P: Population up to the reference time-point.

Total fertility rate (TFR) reflects the average number of live
births that would be born per woman (or a group of women) during

the childbirth period if the woman (or a group of women) passes age-
specific fertility rates observed in a given reference period during the
reproductive period (aged 15 to 49).

In case the specific fertility rates are calculated by age groups
(age-interval of each group is 5 years) then index “i” expresses 7 age

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