Thousands of victims haven't reported and dozens of bishops aren't telling all they know. They have no incentive to.
There's no state in the union where the bishop has been as hard- nosed and vicious as in Colorado. None. I wouldn't even be able to name the second-worst.
Bishops have tried to hide this for years, so there is no reason to believe all of a sudden they would change their ways. The only prudent thing to do is to assume this is not the entire truth. This is a survey, not a report or investigation.