Congs of 120 with 60 attending? A very common report.
I have suspect the discrepancy lies between the "gross" (if I can call it that) amount of publishers in the area regardless of status and the "net" figure of actual publishing publishers is the reality refected in the attendance figures.
With all figures and personal info on computer just imagine the magic numbers they'll be able to produce and use to their advantage. Very facebook of them.