Suicide is not all that common. I went well past my prime before I had personally knew someone who committed suicide. The suicide rate is about 14 per 100,000. In 2017, there were about 47,000 suicides which seems like a big number. Really it is only about .015% of the US population. Now, how many people have the Clintons known that have committed suicide?
I have no idea to your question. I would guess that people under stress or depressed would be more so inclined.
Suicides in single person jail cells are not uncommon, particularly by pedophile prisoners. Ask any cop, jailer or prosecutor.