I don't think whether they're driving or not is a meaningful distinction at this level, people should be expected to sit in any of the seats of a car, so I'm making the fairly safe assumption they put dummies in various different seating arrangements.
The stats apparently originate from the US government, so it's going to be a pretty big sample size that should average out any differences in seating position.
I don't think there are really any conclusive after stats as the product was only introduced to the market a couple of years ago, I guess manufacturers need to buy these and then use them in their in-progress designs. Cars on the market that have used these dummies during design are probably only new designs sold in the past year or so.
I also can't seem to find it with a quick search, but I vaguely remember reading about this when it was new a couple of years ago, and there's a correlation with male safety improving with advances in the crash test process that aren't reflected equivalently with women's safety. But maybe take that with a pinch of salt unless you can actually find the source