Just a couple of random observations to take into account when analyzing that data

1) Games like Primus had a limited production (100 machines) so that data only tells you so much as opposed to a machine where they had no limit on production numbers and ceased making them when orders slowed down.

2) Some of these machines are out of production VS something that's still in production or just started production (Stranger Things, Elvira, Jurassic Park, etc).
The numbers on machines like that should be smaller by nature as not all of the machines that will be produced are out there in the world yet.