Indeed.com has 0 Dart jobs by title and TIOBE is a joke. Given that Google uses about 4 languages routinely (Go, Java, Python & Dart) this is nothing more than internal back-patting with no relevance outside the Googleplex.
I don't even use Typescript and even I know that especially with Angular 2 Typescript is gaining a lot of popularity and it was already doing well before they picked it too. I mean it isn't even on their list in the top 100. How is that possible?
It says that VB.net is more popular than Javascript too. Like that is even possible.
I'm guessing that most people would google "angular ..." instead of "typescript ...", that's why it doesn't show up in tiobe.
This was the last one in Germany.