Ya gotta know how to read the figures
Of course the United States would dominate the rest of the world as far as the number of IP addresses. And of course, less empowered areas such as Africa would be dragging up the rear.
What should be noted, however, is that lowly Antarctica, which has but 15,000 or so IP addresses probably has but one quarter that number of actual residents.
If you work out the number of IP addresses per resident, Antarctica should rank up there near the top right after the USA and Europe. And let's not foget that getting the internet down there is a bit more difficult than just having your local cable or phone company hook you up.