Holy shit,according to your chart it is even bigger than C and Java! How did this happen without anybody noticing?

http://www.indeed.com/jobtrends?q=F%23,clojure,scala,+C,+Jav...

But maybe this is just a result of comparing relative growth rates of job postings. If you take the time to a look at the percentage of matching job positions, then Scala is pretty dominant (compared to Clojure and F#) :D