Again you miss the point. It is not necessarily indicative of less mafia activity only that they value the prosecution of street gangs and 1% motorcycle clubs as they are a bigger threat to the public. Or did you ask them and they told you they put mafia prosecution over that of street gangs and other OC groups?

You act as though it is a stretch to think 1 out of 5 FBI branches places more emphasis on other criminal elements than the mafia. I think most would agree that street gangs are a bigger threat to public safety so perhaps 20% of FBI branches are starting to realize going after gang bangers who shoot out in public serves the public interest more so than going after old men who take bets.