Fair enough. Remember that the "grew" part is something that was reported in December. We know that it takes some time from processing the ATIP request until a lawyer can actually see it. We also know that from 5th November, we got more PPRs for FSW outland, which means that December data could have been generated only shortly after outland cases started to be processed.Said this before mate, you gotta compare "REPORTED" PPRs pre-pandemic vs post-pandemic. We know most people don't report them but more PPRs = more REPORTED PPRs. You can see that the current backlog isn't going anywhere. IRCC reported it too, backlog increased from Oct to Nov.
For updated information, we have to see a new ATIP which I doubt will be posted anytime soon.