In 2013, criminal justice officials in the United States estimated that between $19 Billion to $29 Billion is being smuggled down to Mexico from illegal drug sales in the United States. The sales and revenue from marijuana, cocaine, heroin and methamphetamine is included in that total.
In terms of enforcement, the US Immigration ad Customs Enforcement seized $411 Million in cash that was being transported into Mexico.
The Former Governor of Sinaloa stated that up to 62 percent of the economy in Sinaloa was based on drug trafficking money.
Many of the drug cartels invest in legitimate businesses in order to launder their illicit proceeds. Cartels place investments into shopping centers, hotels, residential developments and various types of economic activities.
Source: John Burnett, “At The Border, The Drugs Go North And The Cash Goes South,” NPR News, March 20, 2014.