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Description: The population includes males and females of all ages.nnTo see at a glance how they are distributed by age and sex, demographers use a population pyramid. But, as you will see, it doesn't always have a pyramid shape. And how do we build one?nnCréditsnDesigned by : Gilles Pison et Sabine BellocnMultimedia Project Manager : Thierry JorinProduced by : SO2 Media nAn animation of the French National Institute for Demographic Studies and of Cité des sciences et de l'industrie
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