The Design and Implementation of laffer1

Linux is primarily used for servers and embedded systems, but some users use it on the desktop.  One website has compiled a list of numbers by region as well as the top twenty countries running Linux on the desktop.   

Linux is most popular in Europe, but the #1 country running Linux is Cuba.

I am not surprised by the observation that the US is at .73% market share.  I only know one person running Linux as their primary desktop OS.  College students tend to do it more frequently and there was that brief period where netbooks ran it.