Population Density Map: US 2000

http://www.uni.edu/gai/India/India_Lesson_Plans/India_Population_Pyramids.htm
Population pyramids are useful tools in displaying geographic information in terms of age and sex distributions throughout specific regions of the world. These tools are specifically imperative to sociologists in mapping trends specific to fertility rates, mortality rates, population sustainability, etc. This example of three population pyramids shows the various forms a pyramid has, and what those shapes mean. For instance, Kenya's pyramid shows high fertility rates and mortality rates, thus rapid growth among the population, while the U.S. has fairly stable grow (our fertility and mortality rates are just at the sustainable level) and Germany has negative growth, that is, there are lower mortality rates and lower fertility rates showing the aging of their population is outshining their growth.