 As the United States of America is the world's largest consumer of cocaine, as well as of other illegal drugs, their demand is what motivates the drug business, and the main goal of Mexican cartels is to introduce narcotics into the U.S.The export rate of cocaine to the U.S. has decreased following stricter border control measures in response to the September 11 attacks.This has led to a surplus of cocaine which has resulted in local Mexican dealers attempting to offload extra narcotics along trafficking routes, especially in border areas popular among low income North American tourists.