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
When I'm bored I go back and replay old games until I find something new so it's hard to give a confident answer but I would say that there were six new games that entered the rotation that I felt satisfied with this year.