Those numbers imo aren't about the actual number of infections. As I see it it's about the results of some specific labs from cases where people wanted to know the exact flu subtype (e.g. to exclude H1N1). It doesn't include the majority of people who just visit the doctor and get a flu diagnosis plus some medicine and go home (or simply cannot afford expensive tests - I don't know if a test is for free when there's a H1N1 suspicion)...

It also can hardly be another way as with like 200000 infections and 40000 seasonal deaths from "standard flus" it'd be hard to reach such a numbers...

EDIT:
Ah ok - you mean that map. Will have a look into it...

EDIT2:
Well it seems this also is just about the result of test labs but not about general flu infections itself. So imo the result of the graph is that swine flu is rather easy to diagnose as people suspicious of having it usually and actually have it...

Enjoy your meal
Toast