population pyramids

Today in class we learned about population pyramids. Population pyramids are a visual image of what percent of the population of a specific country is male or female is a specific age margin. Population statistics are very important thing to know. The data is divided my female on one side and male on the other. Vertically, is the age margins, which divides into every 5 years. Outside the vertical year division is 3 other divisions which is based on what years you can give birth. The first division is pre reproduction which is 0-14. The second division is reproductive which is 15-40 ish. The third is post reproductive which is 45 and up.                                                                                                                         

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