Deletion of List of Thailand provinces by Human Development Index

Comment: There have been keep !votes with the reason that the list is encyclopaedic and notable. However, this was never in doubt. The issue here is that other editors and I have not been able to locate reliable sources to verify the topic at all. -REASON #7 clearly states that "Articles for which thorough attempts to find reliable sources to verify them have failed" is a valid reason for deletion. The HDI is published by the UNDP, but the UNDP reports for Thailand contain no such data (after 2003). The figures given in the article are vastly different from the UNDP figures for 2003. The issue has been raised on the article talk page over a year ago. The article creator isn't able to recall the source of the information. I believe this has been a reasonable attempt to locate existing sources. Sources are available to support a new list based on the Human Achievement Index, but that would be better created as a new, unrelated article
Stance: comment
Cited policy: Wikipedia:Deletion policy (WP:DEL)