https://gs.statcounter.com/os-market-share/desktop/north-america/#monthly-200901-202607
Cloudflare stats also seem to support peaks of 15% usage but around 9-10% on average. In the United States alone, the market share for Linux is nearly 12% now for the whole month and Cloudflare stats suggest peaks of up to 25% (!) Linux desktop usage on certain days and times.
The trendline suggests this is just the start. When will companies realize they cannot ignore Linux anymore?
Look out for any Linux dip in figures, as some people give up trying to use Linux, and move away again. If they hit a tricky problem, and go online for help, some will just scare them away with an over techy response. And they will share their horror story, keeping more people away from Linux.