I'd like to ask a question on the site, but I am uncertain if it would be a good fit there. Can someone here please give me advice?

Specifically, I recently found out that fatal traffic accidents in turkey were around ~3.500 per year with as steady downwards trend - yet in 2015 they rose to ~7.500, nearly doubling the number and staying there for three years, before declining again.

I would like to inquire what the reason for this is, but I am unsure if it meets the site's scope.

That sounds like it would be off topic as this site is more for addressing notable claims not trying to find the reason for something you noticed.