Sony shipped 7.5 million PS4 units in fiscal year 2013,
+ 14.8 million units in fiscal year 2014.
+ shipped 17.7 consoles during fiscal year 2015, and
+ 20.0 million consoles during fiscal year 2016.
The combined total of consoles shipped worldwide between fiscal years 2013-2016 is 60 million
The company forecasted that it will ship 18 million PlayStation 4 consoles during fiscal year 2017,
which began on April 1, 2017 and ends on March 31, 2018.
60+18 ---> 78 (March 31, 2018)