Population profile:
A population profile chart showing the number of people as a function of their ages. This map shows Populations, whether of humans or other organisms, change over time depending on births and deaths as well as migration into and out of an area. Most populations fluctuate mildly over time. Prior to the Industrial Revolution, the human population was stable with minor fluctuations. Populations grew very slowly and growth was apparent only after thousands of years. Since the Industrial Revolution human populations have increased dramatically, growing exponentially with each year and reaching 6 billion by October 1999.
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