[Exim] log parsing

I'm using eximstats to generate reports from the exim logs. What I want
however is a report that contains how much traffic each user generated. If
I run eximstats, it will give me the "top X" list but it also includes top
destination mail servers and not just users. My questions is does someone
know of a good log parser that will give me how much email traffic each user
generated?

thanks,

Aaron