The 405 has posted results of the best-selling vinyl records of the past 20 years. Queen's Made In Heaven ranks at #9.
Unfortunately no other details were provided including what countries the data was taken from. The 405 is based in the UK. link
Since the data was supplied by the Official Charts Company and the list is mostly British artists, some of whom are hardly known in the US, I would say the data must be based on British sales. Weller for instance has never even had an album chart in the US top 100, let alone make a best seller list
Oh! The "Official Charts Company" was not capitalized in the article so I didn't realize it was a proper name (plus I'm from the US and I've personally never heard of the company). Thanks for clearing that up!