Worldwide numbers are almost impossible to calculate. I don't know how they do it because as you said US inflation is not applicable to other countries and not just that, but inflation doesn't affect every industry the same. People have cited inflation when trying to compare Die Another Day and Casino Royale, but this is a bunch of nonsense for that very reason. You can probably come up with some really nice estimates, but they're just estimates. You have to take all of it with a grain of salt. The same can be said for admissions. Thunderball was a huge behemoth, and people like to point this out and compare it to other films (like myself, it's fun), but times were also different. Population, cost of living, market growth, alternatives (DVD, on demand, cable television), etc etc. All of that effects the outcome and more.
Someone posted a list at BoxOfficeMojo that was used by Sony and MGM. It comes from a company called Exhibitor Relations Inc. I think these numbers are closer and this was for 2005 (worldwide).
1. Dr. No (1962) $478 million
2. From Russia With Love (1963) $631.8 million
3. Goldfinger (1964) $852.6 million
4. Thunderball (1965) $1.101 billion
5. You Only Live Twice (1967) $541.7 million
6. On Her Majesty's Secret Service (1969) $413.7 million
7. Diamonds Are Forever (1971) $466.1 million
8. Live And Let Die (1973) $607.3 million
9. The Man With The Golden Gun (1974) $342.1 million
10. The Spy Who Loved Me (1977) $551 million
11. Moonraker (1979) $564.2 million
12. For Your Eyes Only (1981) $466.1 million
13. Octopussy (1983) $394.5 million
14. A View to a Kill (1985) $284.4 million
15. The Living Daylights (1987) $324.2 million
16. Licence To Kill (1989) $259.2 million
17. GoldenEye (1995) $538.4 million
18. Tomorrow Never Dies (1997) $500.6 million
19. The World Is Not Enough (1999) $511.2 million
20. Die Another Day (2002) $521.1 million (This number is based on 456 million which is what MGM reports as its worldwide gross.)
Yes, i think this list is a much closer representation.
(but i'am not sure about the last 2 films, see below)
Exhibitor Relations Inc are the people who collect all the
worldwide box office figures, and they are the source for
the film trade media.
People today do not know how massive GF & TB were in the mid-sixties.
The only figures which i'am not sure of are the ones for DAD apparently
based on an MGM figure of $456.
Also does that mean this list is also based on the MGM figure of $390 mil
for TWINE.
Yet neither of these figures are reported by the film industry analysts,
who have the boxoffice tracking for DAD & TWINE reportedly as having finished
totals of $432 mil & $361.8 mil for these movies.
In fact i queried the boxoffice of TWINE with 'boxofficemojo' in 2000
while the film was playing in its last market i.e. Japan, and at the time
the film was listed as of having a final gross of $352 mil. I can therefore
believe the figure of $361.8 as that would of totted up all the final small
takings around the world........but a jump of $40 mil to $390 mil cant be right.
For the same reasons i don't think DAD's $456 mil is right.