International Voice Traffic

At the end of 2011, Skype accounted for 33 percent of all long-distance minutes, according to Telegeography. That is,  skype carried 145 billion of the total 438 billion minutes. Clearly Skype has
come a long way in the last nine (9) years and made a big dent in cross-border voice (or international calling).
International Voice Traffic 2005-2011 Skype