The youth system of Real Madrid has generated €142.8 million ($167.4 million) over the past five seasons starting in 13-14.
Eleven players have left the club with Alvaro Morata being the most recent departure at €80 million to Chelsea.
Barcelona has earned €17 million with the sales of Marc Bartra, Cristian Tello and Alen Halilovic and Atletico have added €73 by selling four players - Theo Hernandez, Oliver Torres, Borja Baston and Javier Manquillo.
Real Madrid spends €20 million per year running their youth academies.