GNU/Linux Saw Its Biggest Global Boost This Month, Rising 0.6% in a Month Based on statCounter
Based on the latest data (year's end), GNU/Linux is at nearly 4% now.
Notice how big a jump this month:
What a leap!
This is unprecedented, as the graph below shows (this month is on the right-hand side):
Have a play with the full dataset. It is in OpenDocument Format and it corresponds to this graph.