The provided line graph presents data regarding changes in population in the US, Nigeria and Japan from 1950 to 2050.
Overall, all nations are expected to witness an upward trajectory in their population; however, Nigeria is anticipated to experience the most pronounced growth, surpassing the other two countries, as opposed to a slight rise in Japan.
Initially, the United States ranked first with roughly 180 million residents, while Japan accounted for 100 million people, and Nigeria (was made up of / had) nearly 50 million. After five decades, the US, Japan, and Nigeria comprised approximately 320, 150, and 150 million inhabitants, respectively, demonstrating a continuous escalation in the amount of population.
In 2025, although the population of both the US and Nigeria followed an increasing trend by reaching around 390 and 280 million, respectively, Japan’s population levelled off almost at 150 million. Lastly, Nigeria is likely to exceed the US’s population, where the former will make up 600 million and the latter might go up to about 440 million. In contrast, Japan’s population may fall to approximately 120 million by 2050.