population pyramids


Population pyramids really blow my mind to be honest, just the way they are set up and the information they show. They show how many boys and girls there are, and how many of them can live up to a certain age. Places like the U.S. the population from young to old will equal out over the years, due to the total fertility rate. Some other place the population will decline because of how many people are in the post reproductive stage. If the pre-reproductive stage had a lot of kids then the population will rise due to how many people will make it to the reproductive stage, and the total fertility rate of their country.

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