http://www.ifad.org/operations/regional/pf/aids_1.htm
Population profiles, or also known as population pyramids are very useful our ability today to compare population size and age. It stacks the data much like a stem and leaf plot, but on both sides so you can see male and female statistics. Most population pyramids don't have a second variable included like the one above. But in the one above it is a population pyramid of Botswana, and also compares the amount of population that has AIDS.
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