You're ignoring the Spectrum and MSX on this side of the pond. There were no Atari on sight during the 8 bit days.
UK and Iberian Penisula were all on the Speccy, Netherlands was big into MSX, France and Germany on the C64, no idea about the others, but surely not Atari.
UK and Iberian Penisula were all on the Speccy, Netherlands was big into MSX, France and Germany on the C64, no idea about the others, but surely not Atari.