How is Germanwings Flight 9525 (Lufthansa Group) counted under this system?

Good question - at first blush it doesn't appear that it is. I wonder if that's because it was declared a deliberate act by the pilot and was not due to plane/pilot error/safety. I did a surface level dive on the source's methodology and didn't see it called out explicitly.

Point taken, though - you could say that the PiC of that flight might not have been had they better process/procedures.