Officially we have a total of approximately 73,734,000 pieces sold... If you estimate the number of the human beings on the planet are now 7,038,000,000, it appears to be a 1% of the world population owing an Iphone (without taking into account the ones who have lost it ... :P). The Internet users, though, are 2,267,233,742, so probably that makes a 3% of them to own an Iphone. So, 30% does not make any sense.