3 seems to have a market share of roughly 10% (bit less maybe) in denmark, so if we extrapolate that figure, we would get about 1'700 for all denmark carriers, and if we keep in mind that denmark has a population of about 5million, we can extrapolate again to get a total of 170'000 phones for the EU (without taking into account the countries that allegedly don't get the N9)

Conclusion: Extrapolating is fun xD
...(but maybe useless)^^

edit: please correct me if the numbers i've based the calculations on are grossly off, i got all of them in a 30s google search :-)