Cost of Secrecy Continues to Increase
Right. Though what one can only really conclude is that almost all of the material that has been declassified has no bearing on security. Otherwise one needs to demonstrate that the government is diligent about releasing documents that once had a bearing on security, and no longer do, and that they are not extremely conservative in their affordance of this status to classified information. Either case I think is rather unlikely. Much more likely is the case that most of the documents that get released are those that never had a particularly clear relevance to national security, or had one only indirectly. That these are being released at all actually reflects (somewhat) positively on the govt's handling of classified information.