Suicide is non-existent among the Tiv of Nigeria, the Andaman Islanders, and the Yahgans of Tierra del Fuego.
Suicide is present but very rare among black American females, Irish Catholics, Mexicans, and Muslims in Egypt; Suicides are common in Hungary, Germany, Austria, Czechoslovakia, Japan, and Finland. (Source: Comprehensive Textbook of Suicidology)
Sorry that has no permalink... look at Wednesday the 27th.
FYI, correlation != causation. Beginning-level stats.
Actually on topic, Language Log featured a sci-fi short story not long ago with a similar idea-- that we could accidentally decimate an alien race by introducing the concept of suicide:
http://itre.cis.upenn.edu/~myl/languagelog/archives/005416.html
Can you help me out with my Thetan problem?
The Red China numbers are skewed by all the newborn baby girls deciding to kill themselves rather than burden their family with a daughter.