What year do you think the Earth reached maximum occupancy for humans?
We're nowhere near maximum occupancy. Nor will we ever get there. The poll only asks about "occupancy" not the implications, economic restrictions or logistics. Technically we can fit a whole lot more humans on earth.
Maximum Occupancy; Safe and sustainable population. We can't stack them on top of each other. As in a movie theatre, you can get many more in the building.
Or on a ship?