The figures
Budget and worldwide revenue come from TMDB, where they are entered by users. The multiple is revenue divided by budget; costs of marketing are left out.
The rules
Only films rated 6.0 or more by at least 150 voters, with a recorded budget of $100,000 or more and revenue of at least twice the budget; documentaries are left out.
Old films
For old films the revenue usually includes later re-releases.
