Population Pyramid 2.0

Today in class we talked about population pyramids again. I found an article about them that I would like to share. "A population pyramid gives a clear picture of how a country transitions from high fertility to low fertility rate. The broad base of the pyramid means the majority of population lies between ages 0–14, which tells us that the fertility rate of the country is high and above population sub-replacement fertility level. The older population is declining over time due to a shorter life expectancy of sixty years.^[5] However, there are still more females than males in these ranges since women have a longer life expectancy. As reported by the Proceedings of the National Academy of Sciences, women tend to live longer than men because women do not partake in risky behaviors. Also, Weeks' Population: an Introduction to Concepts and Issues, considered that the sex ratio gap for the older ages will shrink due to women's health declining due to the effects of smoking, as suggested by the United Nations and U.S. Census Bureau. Moreover, it can also reveal the age-dependency ratio of a population. Populations with a big base, young population, or a big top, an older population, shows that there is a higher dependency ratio. The dependency ratio refers to how many people are dependent on the working class (ages 15–64). According to Weeks' Population: an Introduction to Concepts and Issues, population pyramids can be used to predict the future, known as a population forecast. Population momentum, when a population's birth rates continue to increase even after replacement level has been reached, can even be predicted if a population has a low mortality rate since the population will continue to grow. This then brings up the term doubling time, which is used to predict when the population will double in size. Lastly, a population pyramid can even give insight on the economic status of a country from the age stratification since the distribution of supplies are not evenly distributed through a population." This is from Wikipedia, and it gives you all of the information about the pyramids. In the end, I find them a very interesting way of showing different countries.