Unformatted text preview: crude birth rate The number of childbirths per 1,000 people per year. Affected by the age structure of the population. The crude death rate is the number of deaths per 1,000 people per year Also dependent on age structure and probability of morality, may even be higher in developed than developing countries as populations age. Doubling time = 70/annual percentage growth rate Population Age Structure In addition to how many people there are, another important facto influencing population growth is the age structure – the population pyramid Population Change Countries generally move from expansive to constrictive age structures as they become industrialized and develop their countries. The demographic transition When death rates start to fall, get birth rates up....
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- Fall '08