It's actually more like 15% globally, if you use statcounter.com numbers [1]. I was being generous by using the early 2021 numbers. Statista probably uses the same source [2]. Netmarketshare puts it at about 10% [3]

1: https://gs.statcounter.com/os-market-share/desktop/worldwide

2: https://www.statista.com/statistics/218089/global-market-sha...

3: https://netmarketshare.com/operating-system-market-share.asp...