Ratio of US/European to Japanese games

[A Black Falcon]

in my collection. ... I thought it was interesting, at least... (and it's really totals, not ratios. Close enough.)

Hardware Japanese Games American/European Games
Game Boy 19 11 36.7% US/Eu releases
GB Color 9 6 40% US/Eu releases
GB Advance 22 1 4.3% US/Eu releases
SNES 37 15 [two games are a Japanese ports of European computer games listed here as US/Europe]
Genesis 34 16 [Sonic 2 was a joint US/Japan team; I listed it as Japan] 32% US/Eu releases
Sega CD 0 4 100% US/Eu releases
Nintendo 64 23 35 60.3% US/Eu releases
Gamecube 25 18 41.9% US/Eu releases
Playstation 24 16 40% US/Eu releases
PC 6 243 97.6 US/Eu releases

... US/European breakdown would be more interesting for the PC list, for sure.

Those two I have notes for are trickier. Like, how do you categorize Super Swing Golf, a Japanese console port of a Korean PC game? I think it makes the most sense to list something by original developer, not the one who ported it, so Super Swing Golf (PangYa/Albatross18) would be Korean, despite Tecmo making the Wii port... but the porting one should be noted somehow too... bah. 0.7 for the original maker and 0.3 for the porting company? :D Not to mention how some games have developers in multiple regions working on them (like art/CG teams in other countries working on the game while the main developers are elsewhere -- it has happened.), and I probably have some of those and didn't note it, but I'm not even going to get into that...