[ps2000]

During this time I still went to school and half of my friends had self-build computers. The other half had computer from very small shops.

And this was also a time when none-Linux Unixes were still still popular, so I would expect some share from them. Linux got a lot of momentum around '98. (Yes, and Macs existed too.) Moreover there was OS/2, BeOS, Irix and whatever... Linux however lost a lot of momentum in the early 2000s when people realized it sucks as a Desktop OS for non-geeks.

90% is well possible I think, but 98%? Never ever.

[streptomycin]

Well, I linked to some data showing it up around 97%-98%. If you think OS/2, BeOS, Irix, or something else was making a significant dent in the late 90s OS market, then... well, frankly I don't know what to say to something so ridiculous.