In demographics, the rate of natural increase (RNI) is the crude birth rate minus the crude death rate of a population. When looking at countries, it gives an idea of what position in the Demographic Transition Model, but to find out how much a country is growing, the population growth rate should be observed.
Usually developing countries have a positive or high natural increase rate. Developed countries have a negative/neutral or low natural increase rate, but many developed countries have their population increasing due to immigration despite their negative RNI.
The formula for the rate of natural increase is:
- (Crude birth rate − Crude death rate) / 10, where birth and death rates are in per mil.
The result is the rate of natural increase in percentage form.
For example, Madagascar's crude birth rate (37.89) minus the crude death rate (7.97) is 29.92; divide that by 10 and the result is 2.992%, Madagascar's rate of natural increase.
Read more about Rate Of Natural Increase: See Also
Famous quotes containing the words rate, natural and/or increase:
“We all run on two clocks. One is the outside clock, which ticks away our decades and brings us ceaselessly to the dry season. The other is the inside clock, where you are your own timekeeper and determine your own chronology, your own internal weather and your own rate of living. Sometimes the inner clock runs itself out long before the outer one, and you see a dead man going through the motions of living.”
—Max Lerner (b. 1902)
“Persecution produced its natural effect on them. It found them a sect; it made them a faction.”
—Thomas Babington Macaulay (1800–1859)
“There seem to be but three ways for a nation to acquire wealth. The first is by war, as the Romans did, in plundering their conquered neighbours. This is robbery. The second by commerce, which is generally cheating. The third by agriculture, the only honest way, wherein man receives a real increase of the seed thrown into the ground, in a kind of continual miracle, wrought by the hand of God in his favor, as a reward for his innocent life and his virtuous industry.”
—Benjamin Franklin (1706–1790)