Anyway, I saw something interesting in the graph. If you just look at C and C#, then in 2011 you notice that where C made a sharp decline, C# made an almost equally sharp incline.
Are these movements correlated? What happened in 2011 that made a bunch of wannabe (since they look for C tutorial) C programmers suddenly turn to wannabe C# programmers?
I realise it may very well be two randomly occuring uncorrelated events that causes these jumps. But I'm very much interested in what kinds of events move the worldwide interest in programming languages.