Correct details on Francafrique

Pan-African Alliance, I just finished 4 month of research on the relation between France and its 14 former colonies in Africa. There is a lot of incorrect data on it online. There is nothing like a colonial tax for example. These are the correct details I found so far, already shocking enough : http://svikaworks.nl/dear-president-macron-its-time-to-let-go-your-outdated-african-policies/ and I ‘m about to publish the 2nd story on it.

I especially likes the infographic of the money going in and out of Africa. I’ve tried to do something like that for France and francophone Africa. Do you know were I can find the data that were used for the graphic? Thanks!