Upvote:4
For the USA the FAA publishes statistics about unruly passengers, both reported and investigated. I'm guessing that an FAA investigation was probably triggered by a passenger restraint.
There was a big jump in 2021 (probably covid frustration related) and has been trending down since then. At the peak amount it was about 13 investigated incidents per 10k flights, while now its back down to 1.7 per 10k flights.
They give numbers of investigations going back to 1995, but they are absolute and not directly relatable to the "per 10k flights". However the absolute numbers show how out of whack covid made things as the incidents were trending in the 100-300 per year until 2021 hit, and then they jumped to 1099 for that year.