I'm reminded of an old joke:

This could be a great year for Haskell's usage in industry, we hope to see its adoption rate jump by as much as 25%. That's right, a whole engineer!

Back on topic: I imagine you're thinking mainly of Scala and Clojure?

Elixir has most job offers, if I'm not mistaken. But that's just what caught my attention recently.

I hear many people complain that they can't find Haskell jobs. Could of course be that OCamlers, F#ers, ... don't complain that much ;)

Just search your favorite job board, you'll see that Scala is far more popular than anything else in this space. Elixir is pretty niche, you can clearly see that on https://whoishiring.io (that is scraping HN among other sources).