A lot of people commited suicide during ww2 but most of them were kamikazis (Japanese Suicide bombers) which where comanded to commit suicide

Suicide rates in North America today occur most often in middle-aged adults. Suicide is now the leading cause of death in America.

There are many different views on the spiritual consequences of suicide. In Japanese society, suicide was a more honorable way to die than to be taken captive. Some religions feel that suicide is an insult against God and his creation.

On average, adjusted for age, the annual U.S. suicide rate increased 24% between 1999 and 2014, from 10.5 to 13.0 suicides per 100,000 people, the highest rate recorded in 28 years. So probably around In one day about and average of 12 people Commit Suicide...

I have put a link to a good guide to help you survive through the suicide mission, although basically it just depends upon you having your team members loyal.