https://www.polygon.com/2017/12/7/16746222/ps4-sales-70-million-units

Sony has now sold more than 70.6 million PlayStation 4 consoles worldwide, the company announced today.

The figure, which consists of internal Sony sales estimates, covers the period from the PS4’s debut in November 2013 through this past Sunday, Dec. 3. It represents sell-through to consumers, not units shipped to retailers (aka “sell-in”). The company does not break out sales figures for the PlayStation 4 Pro, although the head of the U.S. PlayStation division told Polygon in June that at the time, one out of every five PS4s sold was a PS4 Pro.