I want to know what percent of normal mail gets mishandled at any stage of the process. The audit found that 99% of the election mail was handled by the book so

I want to know what percent of normal mail gets mishandled at any stage of the process. The audit found that 99% of the election mail was handled by the book so that is what would tell me if this is just “the post office ain’t perfect” as opposed to there being malicious intent.