population Growth


Hi there. I wonder if there is any way to make the population varies over time, and depending on the policies that apply.
Let me explain. For example USA, has a population of about 316000000 people, what I would like to be changing is such poor amount throughout the game represent 75000000 inhabitants, and remains constant change as policies or normal growth of population. I know there is a section on the surveys tab changes to reflect this, but this way is more realistic.
thanks for answering