Population Structures

Population Structures - Population Structures Before we...

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Population Structures Before we discuss migration, let's talk about the population from an age-sex structural point of view. Every population/society can be compared by an age-sex structural approach called the Population Pyramid, or the graphic representation of specified 5-year age groups within a population and by being males or females. Look at the 1990 US population pyramid in Figure 7 below. Please notice that this pyramid was available on a quick search of www.census.gov and represents blue for males and green for females. A population pyramid for 1990 can tell you some interesting things about the age-sex structure of the US at that time. For one thing, even though there are slightly more females than males, their relative proportions appear about even here. It also shows you the bulge of the Baby Boomers. By 1990, the Baby Boomers would have been between ages 26-44. The high fertility rates of the years 1946-1964 echo in the bulge of this pyramid. Also there is an interesting sex differences
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Population Structures - Population Structures Before we...

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