SPAIN´ S POLITICAL ORGANIZATION

ANALYSIS OF A POPULATION PYRAMID

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In first place we are going to define what a population pyramid is: it is a graph that shows the structure of a society by sex and age at a given time and place. We can divide this pyramid into three sections: young dependents (0-14), working population(15-64), old dependents (65+).

According to the sex structure of this graph, the sex ratio at birth is equaly, the number of girls born are the same as boys (16%), so the sex ratio matches in 0-4 level. In the other hand women have the higher life expectancy. The reasons of that might be historical, dangerous jobs and smoking of men and healthy life of women.

With regard to the age structure of the pyramid we can say that it corresponds with the first stage, It has expansive shape and concave sides because of the high birth rate (39.3%0) and the high death rate (14.5%0), consecuenly the net migration is negative and the real increse is lower than  the natural increase  . According to these characteristics the piramid corresponds to a underdevelop country.

Analysing notches and bumps we can see a bump in 0-4 level that may be caused by a post-war baby boom, also we can see a notch between 34-44 I think it can be due to a war or an epidemic, this also caused a very short life expectancy. 

Finally, we can talk about the transition model shown by the graph. As we can see, this piramid has a expansive shape with concaved sides that corresponds the stage 1. In addition this country has very high birth rate and very high death rate so the life expectancy is very short, 49. 7 years old, very usual in underdevelop countries. using this data we can predict that the evolution of this country will be a lower high death rate and a longer life expevtancy, it will evolve to the second stage.