I was thinking about this today, since I'm close to finishing the game I'm currently playing. I think this year will end up being 4 games for me, though they're JRPGs so it takes me a while longer (and I usually try to 100% games I like)
Finish can also just mean play until you're satisfied too. So maybe a better question is how many games do you usually play each year?
As far as online games go, I'm also playing Splatoon 3 and Overwatch 2
depends on if a game is "finishable" see:Rimworld, EU4, etc. While they all have an ending, I usually either don't bother to achieve endgame conditions or see the end of the time limit.
If a game has a concrete finish, then I will most likely finish it, this year I finished Mother 3 and Earthbound (second time) and Fallout: New Vegas. And least year I got done with the main story of the Pokemon Pearl remake. Thinking back, I finish at least 1 game a year, sometimes up to 4. All depending on how many new games I try out and how many older games i revisit.