Roger that. In 99.9% of cases a modern handgun will not go off unless the trigger gets pulled. Negligent discharge generally happens in two situations: (1) person pulls trigger when they didn't intend to (or is so stupid they pull the trigger intentionally thinking the gun is unloaded. First rule of gun safety is that there is no such thing as an unloaded gun) or (2) person puts unholstered gun in pocket or bag and some extraneous object (like keys) gets in the trigger guard and pushes the trigger.
A VERY common way people screw up under scenario 1 above is they let their finger slide in the trigger guard while pulling the pistol from their holster and then accidentally pulling said trigger and shooting themselves in the foot. Serpa holsters are prone to this because of the placement of the button you have to push to release the gun from the holster.
I’m pretty sure Virginia doesn’t even recognize accidental discharge. I believe all unintentional discharges are classified as negligent, and subject to, at a minimum, review by te local prosecutor.
So 0.01% are unexplained? No relationship to a trigger pull. Seems like that would qualify as dangerous.