This line chart shows us the population growth and it is predicted to be 10 billion in 2150 in the poor countries. And around half billion in the richer countries.

First of all, In 1750 the population was around half a billion, then it increase slowly from 1800 till 1950 when it reached 2 billion. After 1950 the population increased slightly till 2000 and reached 6.1 billion. The total amount of population in 2050 is expected to be around 8.5 billion. In 2100 it is estimated  to be around 10 billion and over 10 billion by 2150 but the total for the more developed countries will remain at about one billion and may even fall slightly.

In conclusion, over all we see the less developed countries increase dramatically which is tripled from 2 till 6 billion from 1950 to 2000 but this just include the less developed countries.