Every planet has exactly same population growth.

in real world there is birth rate, that explains how much percentage of people are birth from initial population.

If 0.5bn people are birth every year from 10bn people, then birth rate would be 5%

and this birth rate is very smoothy changing in times and not very drastically.

So you can imagin if your country's birth rate is 8%, you can also imagine 10years later, it still be 8% around

Then look at into games, if you check population growth in every week(in game time) you can see they growing up exactly same numbers of people are birth despite of planet's population. (actually this part is also funny, people pay a lots of taxes after they just born in a week)

its 0.2bn every week. it is same for 0.1bn population planet, also 50bn population planet, it doesn't concern its population.

then the birth rate could be ranging from 0.4% ~ 200%

200% of birth rate means there is one man, and one woman, woman pregnant 4 childs every week.

so their family have 16 childs in a month. Whoa.

what the whack is it? Anyway, this doens't spoils game a lot. but insightly funny things makes me laugh.

one thing is, population only grows in geometric series, not arithmetric series.