When looking at the numbers, you may want to take consideration the cultural acceptability of suicide. There are cultures where suicide is not viewed the same way, and therefore it may be elevated. Certain philosophies view it as an acceptable decision if someone has suffered greatly and doesn’t wish to anymore (off the top of my head, some stoic philosophers have spoken about it). I haven’t done my research on the topic, but isn’t it somewhat acceptable to kill yourself in Japan in certain circumstances? The taboo factor in other countries likely drives the numbers down as many people won’t entertain the idea because it is “bad”.

The point is, I’m not sure “some cultures suck” is the only part of the equation. We also need to consider how that culture educated their society about suicide.