[Exim] eximstats delivery by router

Hello,

I have Exim 4.30 configured with multiple Redirect Routers that use
the 'seen finish' command to drop mail matching certain criteria.
It would be interested to know how many messages and how much data is
hitting these routers. However, eximstats classifies all such dropped
deliveries as being a member of the ":blackhole:" transport. Is there
anything I can do to differentiate the volume of mail between routers
set up as system filters?

thanks,
hank