Apple’s App Store has served 15 billion application downloads, the Cupertino, California, company announced Thursday.

According to the official numbers, the store has gone from zero to 425,000 apps in just three years. About 100,000 of those are iPad-native.

Those are impressive figures, whichever way you cut them. And, doing some math actually makes them even more interesting. Apple says there are 200 million iOS users worldwide. Dividing one number by the other gives us a figure of 75 apps per user.