If Facebook were its own country, it would be the third-largest in the world.

Fast adoption rates in places such as Brazil, Indonesia, Egypt, the Philippines and Mexico have the site closing in on its next milestone.

Not only is the site on track to have 700 million users, it’s also expected to host 100 billion photos by the summer, according to the photo browser Pixable. The service analyzed the data of 100,000 Facebook users and estimates that 6 billion photos are uploaded to the site each month.

In its latest analysis, Pixable found that women upload a new profile picture about once every two weeks, while men refresh their online profiles about once every three weeks.

Overall, the number of profile photos posted to Facebook has tripled since 2006.

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