I want to know the answer to the following question:
What is the forecast plateau that the population will reach during the 21st century?
All the background I'm provided with is that "From 1950 to 2011, world population increased from 2.5 billion to 7 billion and is forecast to reach a plateau of more than 9 billion during the 21st century.". Is that enough to answer the question?
Answer: yes