Lies damn lies and statistics
You're quoting the stats in the same way people quote benchmarks. While the numbers are probably correct most people stopped thinking about laptop's and desktops a decade ago.
A significant amount of what businesses do these days are done on phones, tablets and servers. The phone and tablets are iOS and Android. If yo ulook at the server side of things most places quote 85-93% are Linux.
If you switch to education you can add chromebooks to the mix with 50-60% of the market.
Yes Windows is is most corporate locations but that is primarily driven by Word, Excel and Outlook which have to run on Windows. Yes there are OSX ports, but they are often at feature parity with the previous version.