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外部の統計調査会社によると4500万台売れてるらしいぞ

Sony's fourth generation console, the PlayStation 4, was first released worldwide in 2013. As of May 2020, it had sold 109.28 million units across the world, including almost 45 million units in Europe.
https://www.statista.com/statistics/1101880/unit-sales-playstation-4-region/