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Population Pyramids
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Population pyramids are graphs that can tell us a wealth of information about a place's people.
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These special graphs are called “pyramids” because most nation’s statistics take the shape of a upward-sloping pyramid.
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The statistics on a population pyramid give governments and others the tools they need to make informed decisions and plans for the future.
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Population pyramids are easier to interpret that most people think!
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Pyramids are types of graphs that depict the basic shape of a country's age and gender structure in a way different from charts like this:
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They are created by making horizontal bars to show how many males and females fall into specific age categories.
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A population pyramid begins with a bar graph that shows the number of people in a country, at each age group. Millions Of People Age groups
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The bar graph is turned on its side, next to another bar graph, turned on its side.
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Population in millions, Males under 4 years old. Population in millions, Females 10-14 years old.
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Pyramids are created with the youngest group at the bottom and the oldest on top.
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There are three general shapes of population pyramids;
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1. Rapid Growth 2. Slow Growth 3. Near Zero Growth
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Rapid Growth:
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A rapid growth's pyramid really has the triangular shape of a pyramid because each group is larger than the one born before it.
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These shapes of pyramids are common in nations with young populations with high birth rates.
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Many developing nations’ pyramids reflect this shape.
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Slow Growth:
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A slow-growth population's pyramid is more of a straight, column-shape.
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It seems to be a nearly equal distribution of the population at most age group categories.
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This shape is common in developed countries, like the United States.
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Near-Zero, or Negative Growth:
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A population that is not growing, or actually decreasing produces a different shaped pyramid.
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The bottom of its pyramid narrows.
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Many highly industrialized societies are actually experiencing negative population growth.
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Their pyramids reflect the fact that fewer children are being born and more elderly are living longer.
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How do Pyramids Predict the Future? Explain the changing needs of government services,
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If a country's population is growing tremendously, the need will be immediate for more schools and teachers, then eventually, the need for more health services for the elderly!
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Burkina Faso, 2000 Burkina Faso, 2025
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Possible usage of natural resources,
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INDIA, 2000
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INDIA, 2025
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INDIA, 2050
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Let’s look at population pyramids for Indonesia for the next few decades… Can you predict what decisions and plans will need to be made for the future?
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INDONESIA, 2000
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INDONESIA 2025
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INDONESIA 2050
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Population pyramids are useful predictors of the growing needs of our planet!
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Population Pyramids
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Source: U.S. Census Bureau
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