So I took the 2016 numbers from this and used them to make this graph, using the same data but normalizing for github's growth - so its showing the % share of the overall instead of absolute #'s. It tells a different story:
https://docs.google.com/spreadsheets/d/1zs1pO_8Q6RASJ6Mc10kB...
EDIT I don't think one is more correct than the other, its just another perspective. I didn't mean to imply the first one is incorrect.