They don't seem to publish much, and I don't think there has been a lot of training going on generally in the industry
Depends what you're after I guess. If you are a new, recently trained pilot, and wanting the North Sea, go to Helicentre. Their graduates have a high success rate and are getting employed quickly into the North Sea operators.
If you have plenty of flight time and want HEMS, go to Babcock - 135 rating and links to industry
Onshore civil, perhaps Starspeed who have quite a few contracts for VIP
Have you actually just gone to each training provider to ask how many courses they run? They should be able to give you an idea of the market, but its probably not a fair representation what's been achieved in the last two years!!