It's not until The Dark Knight and The Avengers that comic book movies started to make vast amounts in the foreign market though. Compare X-Men 2 and The X-Men Movie We All Agree Never Happened to contemporary movies. They did worse than the Toby Maguire Spider-Man movies, those X-Men films made more than Fantastic Four, Daredevil, Hulk, Batman Begins, Superman Returns, and Ghostrider.
Maybe the numbers are way higher in the last few years because Thor and Captain America have particular resonance with other cultures, or maybe it's a result of a bigger global market and particularly Disney/Marvel's branding success. I know which one sounds more plausible to me.
edit: Also the X-Men movies just didn't make as much in the US as the Batman, Spider-Man, or Iron Man movies, so.