World population growth

The line graph shows the growth of population in both the rich and poor countries between 1750 and 2150. This issue has accord to the United Nations and stole the spotlight for a while.
in the mid of the 18th century the world population was less than one billion, studies proved that developing countries had a bigger population than the developed countries not only by double but 3 or 4 times the population. By the 21st century the population reached up to 6.1 billion never the less only one billion of that was from developed countries, it is thought that by 2150 the population will reach to approximately 10 billion, still of the 10 billion only one billion would be the developed countries maybe even less.
Studies prove that over the next hundred years the population will grow but the developed countries unfortunately stay the same our fall even less.