Alberto Gallego Gordon The structural causes of instability and conflict... 333 The following graph illustrates the marked pointed shape of Chad’s population pyramid due to a mostly young population. Graph 7. Population pyramid of Chad in 2016. On http://www.indexmundi.com/chad/age_structure.html. Based on the website of the U.S. Central Intelligence Agency, CIA. On https://www.cia.gov/library/publications/the-world-factbook/ fields/2010.html. Date of reference 30/03/18. In clear contrast, the distribution of age ranges in the Spanish population shows a higher proportion of citizens aged between 30 and 60 years. The result is a considerable increase in the population of these countries, in con-trast to the negative rate of natural increase of 0.2% for Spain in recent times, as Graph 8. Population pyramid of Spain in 2016. On http://www.indexmundi.com/spain/age_structure.html. In turn this is based on the website of the U.S. Central Intelligence Agency, CIA. Available on https://www.cia.gov/library/publi-cations/ the-world-factbook/fields/2010.html. Date of reference 30/03/18. Revista del Instituto Español de Estudios Estratégicos n.º 12 - Año: 2018 - Págs.: 325 a 366
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