Page 56 - môc lôc

Crude birth rate
Crude birth rate indicates that for every 1,000 people, how many live

births are in the reference period.
Formula:

B
CBR (‰) = × 1000
P tb

Where:
CBR: Crude birth rate;

B: Total live births in the reference period (total of children were
born alive in the reference period);

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

Total fertility rate (TFR)

Total fertility rate reflects the average number of live births that
would be born per woman during the childbirth period if the woman passes
age-specific fertility rates observed in a given reference period during the
reproductive period.

Formula by age group:

49 B
TFR   x

x 15 W x
Where:
TFR: Total fertility rate (children per woman);

B x: Number of live births registered in the year of women aged (x);

x : One-year age interval;

W x: Number of women aged (x) at the calculation mid-year.

Age specific fertility rates are accumulated from x = 15 to x = 49.
In fact, the total fertility rate is calculated by the abridged method. In

case the age specific fertility rates are calculated for 5-year age groups,

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