What is the average salary of Catholic school students?

I looked it up on almost every search engine but couldn't find anything! They just told me the average Catholic school teacher salary. I would also appreciate it if you could tell me the average grades.|||in the UK, if it is state funded... it is the same as any other teacher in any other school. However, if it is inner city, then they may receive extra living allowances, up to 拢5,000 extra as it costs more for travel and living!