Doesn't mean you shouldn't aim for that. I have around 15k employed...just 15% of your city, but I only have a level 6 inno and a handful of tribal squares at progressive. Inno, the Habitat, both of which leveled to idk, 30 and about 30 or so tribal squares...should give more than enough population, and if not, add more levels and more squares. The squares themselves remove the need for goods buildings, only require one lane road, cost nothing to produce goods, so you would need far less.
The Habitat, the tribal squares and of course, aiding, aside from event buildings that give them.