Yes, how could they actually know this stuff?
Reminds me of when in covid, they had these absurdly high vaccination rates (where i live). To the extent that in some age bands there were more vaccinated people than the whole population.
It basically revealed that (in this case) they had grossly underestimated the population.
(This was also cynically used to make misleading stories about things like the rates of unvaccinated admissions to intensive care. Because if you have 2 people in IC and you think the population is 4, you can say half of all unvaccinated are in IC.. ..but the actual number of unvaccinated might be 200,000, say..)