The world's largest producer and exporter of cocaine doesn't know its own production. The figure exists, but no one can vouch for its accuracy. After nearly 20 years using the same methodology, Colombian President Gustavo Petro denounced its inaccuracy and decided not to release the numbers. The cocaine production figure, which has continued to rise, became a state secret. Four dubious digits that summarize a huge problem: Colombia lacks a reliable method for measuring one of the world's most profitable illegal businesses.