What % of illegal drugs are trafficked via the U.S.-Mexico border?

Let's talk about Mexico’s involvement in the illicit drug trade in the United States in numbers and specifications :

US and Mexico, called the Southwestern border or SWB.Drug cartels in Mexico utilize drug mules, tunnels, boats, vehicles, trains, aircrafts, donkeys, and couriers to get illegal drugs into America. Mexican drug cartels make an estimated $19-$29 billion a year on drug sales in the United States. Conflicts between drug cartels over territory as well as the attempts to stop drug trafficking by law enforcement officials often results in violence, and this has caused over 55,000 deaths since the proclaimed Mexican Drug War began in 2006.

Marijuana: Mexico is the number one foreign supplier of marijuana to the United States, and marijuana is thought to be the top revenue generator for Mexican drug cartels.

Cocaine: Mexico does not produce cocaine, however, Mexican cartels move Columbian cocaine through South and Central America and into the United States. An estimated 93 percent of cocaine headed to the US from South America moves through Mexico.

Methamphetamine: Mexico remains the biggest foreign supplier of methamphetamine to the United States, and Mexican drug cartels set up labs to manufacture meth on both sides of the border, controlling labs in Southern California as well as domestically.

Heroin: While Asia and the Middle East remain the biggest producers of heroin, Mexican black-tar and brown heroin is on the rise. In fact, 39 percent of heroin identified under the DEA’s Heroin Signature Program (HSP) in 2008 came from Mexico, making Mexico the source country for many of the heroin abusers west of the Mississippi River.