Ryng on 12 February 2018
Xbox one yearly sales.
2013 - 3.0 million
2014 - 7.5 million
2015 - 8.6 million
2016 - 8.5 million
2017 - 7.4 million
NOTE: Every years, expect 2013, are just estimate, not confirmed numbers, so they may be wrong, but they are the estimate we have so far.