I've read a trustful statistics for Switzerland in a newspaper ~1-2 years ago which showed MS market share to have dropped to ~78%. If I remeber correctly this was only
for desktop and servers, not even including mobiles.
The're are also some online sites stating that Linux has a share of ~1%, hahaha now this must be outdated by ~10 years at least.
online statistics tend to count web browser usage shares, not marketshare or number of installations. Since the vast majority of Linux devices today are in the embedded and server markets they simply don't show up in the browser statistics. (Nor does machines that happen to run any good adblock browser plugin that also blocks the stat trackers)