<P> 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 . 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 . </P>
<P> 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 . 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 . </P>
which age group of population indicates the largest working population
which age group of population indicates the largest working population
15 -- 64
15 -- 64