Even though these languages have been around for decades, they are just recently being spliced into the mainstream via lambdas, immutability, etc. So I could easily see Haskell make a comeback.
http://www.indeed.com/jobtrends?q=clojure%2C+haskell%2C+scal...
But they both lag Scala.
http://www.indeed.com/jobtrends?q=clojure%2C+haskell%2C+scal...
Everything I've observed suggests that Scala has a far greater rate of adoption than Clojure, and Scala's usage is still basically irrelevant compared to that of the major entrenched languages. I'd put the adoption of Haskell closer to that of Scala than I would to Clojure.
Maybe on Silicon Valey startups.
In Europe I see a lot of Scala, Haskell, F# taking up in the finance and insurance areas for data modelling.
The boring enterprise is all about Java, C# and VB variants.
I do like Clojure, and it is the most successful Lisp dialect but it is far from thriving.