Instagram, the mobile photo and video sharing network that launched in October 2010 took 19 months to chalk-up 50 million users. The next 50 million users came in a mere nine months, thanks to the launch of Android version of the app. Six months later, Instagram says that it has surpassed the 150 million user mark. “Now more than 60% of you are from outside the United States,” the company noted on its blog. Mobilize 2011: Kevin Systrom – CEO, Instagram If Instagram continues to sign-up people at this pace, it will soon race past 200 million users.