It gets cited a lot in immigration litigation as well (eg in asylum arguments) because it's an unimpeachable factual source that the government's lawyers can't reasonably dispute.
In what ways would you use it like that? Honest question, I'm not at all familiar with what was in it.
Now that you mention it, I'm pretty convinced this is the reason they took it down. If you can't dispute the facts, get rid of them, I guess.