Facebook today announced that nine percent of the African population now uses its social network — a noteworthy milestone as the company pushes for more global ad revenues.

With 100 million of Africa’s 1.1 billion residents signed up, Facebook also shared today that it plans to open an office in Africa before the end of the year, Reuters reports.

Of Facebook’s African user base, 80 percent access the Web via a mobile device. This follows a global trend, as a majority of Facebook’s revenue now comes from mobile.