I mean 10% of new code for which type hints are a proper use case, so mostly libs, and targeting Python 3.5+.
Of course, in a world of Python 2.7 still being a large code base and Python being used a lot for scripting, this will far from the truth for the entire ecosystem.
The idea that types are hostile to scripting sounds really weird to me. Turtle[0] in Haskell is absolutely amazing for scripting -- especially if you pair it with Stack (with its shebang support) -- and it is as strongly typed as Haskell.
There is a bit of learning curve (because, well, it's not shell which is what most people are used to), and you do have to please the compiler before being able to run your script, but OTOH, you'll basically never have that "oops, I just deleted my working directory because I used a bad $VARIABLE" experience.
Of course, in a world of Python 2.7 still being a large code base and Python being used a lot for scripting, this will far from the truth for the entire ecosystem.