The main reason given is that the article was original research. In other words, it was not just unsourced, but fundamentally unsourceable. There is nowhere an editor can go to reliably determine whether the entries in the list are correct (at least, not to the knowledge of anyone who participated in the deletion discussion). That puts it well outside the bounds of Wikipedia's mission as an encyclopedia, which is a tertiary information source that only summarizes information from other sources.

> This list is essentially unsourced and because of the nature of these numbers being unpublished, will always be original research. Does not seem to be a notable list.

Seems like pretty good reasoning to me. The list is unsourced and Wikipedia is an encyclopedia. Plus it's not a notable topic, something I'd also agree with.

Perhaps there ought to be a "wiki facts" website where such material could be published and editors could attempt to ascertain its validity and publish any facts that can be confirmed, even if not with typical encyclopedic quality sources.