Stats like this really need to cite their sources to have any real creditability:
While I don't doubt the meat of these stats, I'd like to know how old it is. For example, does it include Duke Cunningham who's no longer a Congressman, etc? Also, accused is a very weak word - does that mean accused in a police report or court of law or is it like when my wife accuses me of being a pig? (bad example, since the ladies are saying, "All men are pigs.")
Also, to say "little more than 500 employees" is like saying a fighter squadron only has 30 or 50 people since that's how many fighter pilots there are in a squadron. Never mind the support staff to run the Congress or a squadron.