Junior G4 FO line holder typically is very close to being able to hold CA. I've posted the junior CA data so a line holding G4 FO is close to that. That's about your answer for each base.

In DFW and LGA(JFK) the difference between junior CA and line holding 777 FO was 100-150 numbers for August.

For a snapshot of today that's close enough. It might, and could, change.