In Fiscal Year 2008, Arizona border guards seized nearly 75,000 pounds of illegal drugs entering from Mexico.  The estimated street value of the drugs was more than $235 Million.

Marijuana was the most seized drug, with 71,000 pounds confiscated.

Source:  Randal C. Archibald, “U.S. and Mexico Agree on Shift in Drug Trials,” New York Times, October 30, 2009.