In 1999, a report estimated on the economic impact to the United States and Mexico if the illegal drug trade was completely eradicated and the black market money was no longer flowing through the financial system.
From I am the Market by Luca Rastello:
According to the 1999 report of the Mexican Center for Investigation and National Security, “if drug smuggling were to be eradicated, the economy of the United States would suffer losses of between 19 and 22 percent, while the Mexican economy would see a fall of 63 percent.”
Source: Luca Rastello, I Am The Market: How to Smuggle Cocaine by the Ton, in Five Easy Lessons, translated by Jonathan Hunt (Faber and Faber, New York. 2010), page 12.