no offense, but that makes no sense whatsoever
It makes perfect sense, if the entire decline was in architects then there would be 0 architects left.
Though I'm a mechanical engineer and my company hasn't really been affected, and my brother is an architect and his company has shrunk from 15 to 3. So I imagine the OP is right that a large chunk of the decline is from architecture/construction related jobs, but certainly not all.
i agree that the entire decline couldn't have been in architects, but remain mystified as to how (someone would conclude) this implies the _majority_ wasn't in architects
So the majority of 10% decline are engineers.