viernes, 8 de enero de 2016

DEMOGRAPHIC PYRAMID


A population pyramid is a graphic representation of bars that shows the demographic structure according to two changeables: sex and age, in a city or a country.

Observing the sex ratio we can say that the same number of men and women born during this year. Sex ratio matches at the 45-49 years old bar. When looking at the top of the pyramid it is clear that women have a higher life expectancy. The reasons of that might be that testosterone reduces life expectancy in men because of biological reasons.

The shape of this pyramid shows that most of the population was young people. In addition, the structure of the pyramid exhibit that there were high birth rates and high death rates. So, this pyramid is an expansive pyramid that is on stage 2 (high birth rates and falling death rates). The age group with a larger number of people is the bottom one; this means that there were a lot of births that year. Also, we can see a bump due to the 10-14 years old bar. The causes of this young population could be better hygienic conditions for the children. The lack of old people may be a consequence of the Afghanistan’s war or terrorism.


The consequences of the demographic structure of the pyramid are investments in the educational system. According to the data shown, we can predict that the demographic evolution of this country will be to stage 3.

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