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 of, 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)
“Unless a group of workers know their work is under surveillance, that they are being rated as fairly as human beings, with the fallibility that goes with human judgment, can rate them, and that at least an attempt is made to measure their worth to an organization in relative terms, they are likely to sink back on length of service as the sole reason for retention and promotion.”
—Mary Barnett Gilson (1877–?)
“When human beings have been fascinated by the contemplation of their own hearts, the more intricate biological pattern of the female has become a model for the artist, the mystic, and the saint. When mankind turns instead to what can be done, altered, built, invented, in the outer world, all natural properties of men, animals, or metals become handicaps to be altered rather than clues to be followed.”
—Margaret Mead (1901–1978)
“There is held to be no surer test of civilisation than the increase per head of the consumption of alcohol and tobacco. Yet alcohol and tobacco are recognisable poisons, so that their consumption has only to be carried far enough to destroy civilisation altogether.”
—Havelock Ellis (1859–1939)