Board Thread:Questions and Answers/@comment-25356210-20160710221950/@comment-26065062-20160711082854

It depends on the population increasement rate and age of the civilization (and possibly major events like plagues, wars, etc.). You can easily calculate it with direct proportionality. For example: If the population of the race of Doughnuts increased by 1M this year with a base population of 10M, then x=1 and y=10 and since y/x=k, then k=10. And so, now that the population is 11M, it increases by 1.1M (y/k=x, 11/10=1.1), and so on and so on. Of course, making these calculations would take some time if you counted year by year, but you can just increase the scale and put a lot bigger number in x, and so have the pop. increasement rate in a century, or a millenium.