(1) The increase in the number of persons per 100 persons in the base population, in a given year, is called the annual growth rate of population.
(2) The annual growth rate is affepted by the birth rate in the following ways :
With the increase in the birth rate, the annual growth rate of population generally increases.
For example, since 1981 the birth rates declined rapidly, still 18.20 crore people were added to the total population in the 1990s alone. If we calculate annual growth rate based on these data, it becomes high.