But, for regular citizen documents, its the entire lives of 100 to 1,000 people.
He got nothing from any Apple customers' files. Those are encrypted and broken into four parts and stored in four different places. What he got were the old source codes of the old versions of iOS. Those were showing up on Reddit and other hacking sites sometime late last year and Apple tracked down the breach to this kid in Australia. He was arrested then and has already gone to trial. It's only now being exposed as he awaits sentencing for his misbehavior.