The graph provides information predictions about changes in population in three countries between 1950 to 2050.
Overall, the main point that is noticeable is that the number of people living in United States and Nigeria is expected to increase by the year of 2050, meanwhile the population rate in Japan is not estimated to change dramatically within 100 years.
It can be observed that the number of residents in the United States had been growing slightly from nearly 200 million people to approximately 450 million during the whole period starting from 1950 to 2050. Likewise in America, the number of Nigerian residents is estimated to increase. The amount of Nigerian people is estimated to have a significant growth from 2000 to 2050 by almost 450 million people.
On the other hand, Japan had not been experiencing significant changes in the number of inhabitants. Comparing with the United States and Nigeria, there was a slight growth in the number of people in Japanese cities starting from 1950 to 2000, the number had grown by 50 million in 50 years. Lastly, it is estimated to see a decline by the 2050.