Mobile developers: http://www.indeed.com/salary?q1=Mobile+Developer&l1=Unit...
Senior Android developers: http://www.indeed.com/salary?q1=Android+Developer&l1=Uni...
Junior Java developers: http://www.indeed.com/salary?q1=Junior+Java+Developer&l1...
Node.js: http://www.indeed.com/salary?q1=Node.js+&l1=United+State...
No matter what you plug in, you will see 2-year inflation-adjusted increases in the vicinity of 0%.
Even better, go ahead and play around with same title, different seniority.
Junior iOS programmer: http://www.indeed.com/salary?q1=junior++ios+programmer&l...
Senior iOS programmer: http://www.indeed.com/salary?q1=senior++ios+programmer&l...
See how juniors get raises, while seniors get flat-lined? That's the downward pressure of H1Bs as well as evidence of buyers' (hiring managers) actual purchasing behavior markedly different from "we can't find anyone who can do basic fizz buzz! we need people with skillz!".