Money laundering (the law enforcement side!) used to be one of my "Day jobs" as the IPE "exchange policeman", and before that, I was clearing out some of the crooks from the commodity markets in the AFBD (before it was rolled into the FSA), and before THAT in fraud investigation for the DTI.....

All right then: what inferred and estimated data is there?

"The future is already here -- it's just not very evenly distributed" William Gibson