Page 55 - Niên giám

Where:
TFR: Total fertility rate;
B : Number of live births in the reference period of women
i
in the age group (i);
th
i: i age group;
th
W : Number of women of the i age group up to the reference
i
time-point.
The coefficient of 5 in the above formula is applied for the average
rate of consecutive 5-year age groups so that the TFR will be
commensurate with the age-specific fertility rates described in this formula.

Crude death rate is one of the two components of natural
population increase. High or low value of crude death rate can affect the

size, structure and population growth rate. Crude death rate indicates that
for every 1,000 people, how many deaths are in the reference period.
D
CDR   1000
P
Where:

CDR: Crude death rate;
D: Total of deaths in the reference period;
P: Population up to the reference time-point.

Infant mortality rate is the measure of the mortality level of
children in the first year of life. This rate is defined as the number of
children under one year of age per 1,000 live births in the reference period
on average.

D
IMR  0  1000
B

Where:

IMR: Infant mortality rate;
D : Number of deaths of children under one year of age in the
0
reference period;
B: Total of live births in the reference period.

53