The last several years I have taught on this topic for the ABA Conference. Each year I contact the regulatory agencies and ask them for this info. Most are reluctant to give this out and hence, we aren't seeing this information as readily as in years past. The regulators tell me that when they produce a "Top 10 list", they find that the field examiners seem to focus on these even more. Therefore, many agencies have stopped providing the information.
The FRB issues an annual report each year to congress. They don't list the violations in any order (1-10), but you can extract it. The OCC doesn't keep any statistics for their large banks, but I've been able to get it for their small banks. The FDIC also has sent me information.
For future reference, you can probably Google this (I have done so in the past). If you want to look back, visit the E-Newsletter Page of our Website
and go to the "Archives". There you can see a brief description of each month's topics. You can scan the topics for "top viola tons". For instance, in June 2006, we ran an article on the "Top Violations of 2005". This was a consolidation of all 4 banking regulators.