In the United States, unlike the West Indies, the slave population grew by natural increase.
"In 2000, the E.U. had a natural increase of 343,000 people," Mr. Chamie said.
Much of the growth of South America's largest cities has come about from natural increase.
The steepness of the curve depends on the intrinsic rate of natural increase for the population.
Until the 1970s, natural increase contributed more to population growth than immigration.
Mongolia's rate of natural increase reached a peak in the 1960s and declined slowly thereafter.
Few followed thereafter, but by natural increase the population began to expand rapidly.
In total, 1,700 counties experienced a negative natural increase at least one year this decade.
Panama's rate of natural increase was about average among Latin American countries.
Population has subsequently grown, the result of both migrational and natural increase.
Low birth rate and the negative natural increase is a matter of existential importance for Estonia.
