I would suggest that you ask the archivist of Canada. What happens is that departments store things in filing cabinets and storage rooms.
I remember looking at this during the Harper government's deficit reduction plan. Something like 15% to 20% of government real estate was used to store filing cabinets and records. There was a hope that digitizing them would free up real estate and real property, but there's a labour cost of actually going, retrieving, sorting out, applying the exemptions and sending those up the line. Higher up the line, you're dealing with the scarce time of senior managers who have to sign off on the final release, and so on.
It's certainly a large number in terms of the cost of servicing this function. It's scattered across.... It isn't the ATIP shop. The ATIP shop will coordinate the request and chase people down, ask for them to retrieve things and remind them of their obligations, but it will end up in—I don't know—the Regina office of the department or some line function of Veterans Affairs, and so on. It's incredibly uneven out there because of different budgets, different histories and different capabilities in records management and retrieval.
My understanding of it is that as more and more things are created, there's actually more being created than can be processed by Library and Archives and the people who work in that area.
If you want a cost estimate, I think maybe talk to the national archivist.