IMO, education is the gateway to opportunities and helps achieve financial independence which in turn is the gateway to a better health. There may be a correlation between these suicides and the people possibly not having access to those (opportunities and the resultant independence).

Poverty could be behind these suicides as it can cause a tremendous amount of stress which may lead to chronic depression and anxiety, and for temporary relief people look to drugs/alcohol and those with addiction are at higher risk for suicide. AFAIK, most addicts are poor, unemployed, and uneducated and I see a clear correlation between economic status and abuse.

Some articles worth glancing through:

Suicide: One of Addiction’s Hidden Risks https://www.psychologytoday.com/blog/real-healing/201402/sui...

http://www.dualdiagnosis.org/drug-addiction/economic-status/

https://www.theguardian.com/us-news/2016/feb/07/suicide-rate...

And, here’s a related study by Princeton academics who won the 2014 Nobel Prize for economics.

http://www.pnas.org/content/112/49/15078.full.pdf