"The 13 Careers Where You’re Most Likely To Commit Suicide."

Are these jobs making people more suicidal or do more suicidal people take these jobs? Another possibility: These people aren't more suicidal, they're just more likely to follow through, perhaps because they have lower moral/religious inhibition about the deed — e.g., scientists (#11) — or because they're more adept with the tools of self-murder — e.g., skilled manual laborers (#12). — or both — e.g., doctors (#9).