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)
“Writing a book I have found to be like building a house. A man forms a plan, and collects materials. He thinks he has enough to raise a large and stately edifice; but after he has arranged, compacted and polished, his work turns out to be a very small performance. The authour however like the builder, knows how much labour his work has cost him; and therefore estimates it at a higher rate than other people think it deserves,”
—James Boswell (1740–1795)
“An Englishman’s never so natural as when he’s holding his tongue.”
—Henry James (1843–1916)
“The whole value of history, of biography, is to increase my self-trust, by demonstrating what man can be and do.”
—Ralph Waldo Emerson (1803–1882)