According to GalCiv Wiki data tables a PQ 10 planet has a population limit of 21,6 bln. Yet in my game Earth being PQ 10 planet can't grow above 15 bln for several turns. I have enough food for 18 bln and moral on a planet is 100%. Yet no change in population. Are there any additional factors affecting population growth?
P.S. And no I'm not building any colony ships or transport ships on Earth that would take away population from the planet. Oh, and my empire wide approval rate is around 80%.