VGChartz' William D'Angelo: "The PlayStation 4 in 2015 sold 16.74 million units, a 15 percent increase year-over-year, to bring its lifetime sales to 35.79 million units. 124.53 million games were sold at retail on the PS4 in 2015 and has now sold 205.30 million games lifetime.
The PS4 proved most successful in Europe, but also sold well in the USA and Japan. It sold 6.26 million units in Europe, 5.69 million units in the USA, and 1.27 million units in Japan.
29 games for the console in 2015 managed to sell over one million units and four games sold more than five million units."