Windows Phone Installed Base hits 80 Million-When did this happen?

Well since January 2014, there has been over 50 million WP users (7 and 8), so maybe from that time to now, May 2014, it could've gone up to 80 million?

If Nokia/Microsoft had sold 30 millions phones in the first quarter of the year, my stock would have gone up 3 fold.
 

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