Why was Graf Zeppelin's hangar underpopulated?

Did the Luftwaffe restrict aircraft supply to Graf Zeppelin?

At points it did, but the larger design penalty came from demanding land-base-like hangar space for each aircraft.

The Luftwaffe did restrict aircraft supply at some points. A greater design problem was its insistence on hangar space per aircraft comparable to a land air base. That requirement left Graf Zeppelin with a sparse air group for a carrier of its size.