"In 2008, of the $35 billion U.S. cocaine market, for example, coca farmers in the developing source countries made about $500 million. This equates to 1.4 percent of gross profits. Traffickers within the source countries then made approximately $400 million (one percent), followed by international traffickers (i.e. Mexican drug cartels) who made $4.6 billion (13 percent).25 When added together, only 15 percent ($5.4 billion) of the $35 billion retail value was made in developing source or transit countries. This means that $29.6 billion was generated after the drugs entered the United States."

Source

Haken, Jeremy, "Transnational Crime In The Developing World," Global Financial Integrity (Washington, DC: Center for International Policy, February 2011), p. 5.
http://www.gfintegrity.org/st…