Maybe not exactly what you want but it is a "% of developers who are developing with the language or tech and have expressed interest in continuing to develop w

Maybe not exactly what you want but it is a "% of developers who are developing with the language or tech and have expressed interest in continuing to develop with it". http://stackoverflow.com/research/developer-survey-2016#technology-most-loved-dreaded-and-wanted http://stackoverflow.com/research/developer-survey-2016#tech...