Methodology links for each ranking:
TIOBE: https://www.tiobe.com/tiobe-index/programming-languages-definition/
GitHub: https://github.com/collections/programming-languages
RedMonk: https://redmonk.com/sogrady/2019/07/18/language-rankings-6-19/
IEEE: https://spectrum.ieee.org/static/ieee-top-programming-languages-2018-methods