The statistics in which I would be interested are:
1. What percentage of divers sought additional training because they intuitively felt something was lacking in their training or they didn't feel adequately prepared and hoped the next level would remedy that feeling?
2. What percentage of divers taking further training believed that the education would be lacking in their course, but did a class just to get a C-card so they could get nitrox, do advanced dives, etc?
3. What percentage of divers were sold the idea of "going pro," but deep down believed their skills and experience didn't merit it?
4. What percentage of divers went "pro" within 1 year of initial OW cert? 2 years? 3 years? 4 years? 5 years? 6? 7? 8? 9? 10 or more?
5. What percentage of divers felt extremely challenged by their courses?
6. What percentage of divers want "quick and easy" over "longer and harder" training?
7. What percentage of divers didn't feel comfortable in the water until DM and instructor levels?
8. What percentage of divers still don't feel comfortable at these levels?
9. By what recreational course do most divers believe they are "real" divers?
10. What percentage of divers took technical training to fix gaps in recreational training rather than because they wanted to dive at the technical level?
Agencies rarely report or accurately report certification data. It is my experience, as an industry insider, that numbers are fluffed to give the appearance of greater success when they are presented. Agencies or instructors with higher standards also have higher failure rates for advanced training. More divers would go on to the next level, but wouldn't be certified. Money is in the instructor's pocket, but no C-card has been issued. I still have divers working on AOW and Intro To Tech passes. Statistics are often crafted to support the success and growth of a declining industry and what may seem like growth might really be a decline if compared to diving's yester-years.