To cover another point some folks like to make - "100+ developers for a decade, MY WORD!" The company didn't even have 100 people when i joined. I wasn't there, but I would wager back in 2012 it was a little over a dozen folks, some of which were probably still looking at Warband (remember several DLC, even with external partners, require some involvement, same goes for console releases). Similarly, "working on the game" is such a hugely vague concept. I write design pitches in my free time and build little unity games cuz it's fun. If I ever release one of these in 20 years time, does it make them the longest developed game in the world? Finally, the previous, public break down of the teams is a pretty clear indication that not everyone is working on adding features / content to the game (management, testing, support, etc.) but are nonetheless essential parts of the company.
TLDR: These metrics are largely pointless, because they do not give you any real insight on what happened when.