Your data is showing that Scala grew from 0.01% to 0.03% over the past two years. Sounds impressive, right?

It's a relative number. Whenever somebody quotes growth numbers instead of absolute numbers, they are trying to hide something.

Let's take a look at the absolute numbers:

http://www.indeed.com/jobtrends?q=scala%2C+java&l=

As you can see, Scala's line is a flatline around 0 compared to Java.