I think it's important to question what this means, lest we reward inept agencies with more money. Not to say that the agency that did take this long would necessarily be inept, but if you give access to the sufficient data for let's say a post-doc of appropriate background, would it be reasonable for this single person earning scraps, as post-docs are wont to do, to take e.g. 8 years? It's just quite a peculiar issue.