|Buffalo-Niagara Falls, NY||16,523|
|Sault Ste. Marie, MI||6,866|
|Port Huron, MI||3,881|
|El Paso, TX||48,420|
|San Ysidro, CA||31,025|
SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics, based on U.S. Department of Treasury, U.S. Customs Service, Office of Field Operations, Operations Management Database, 2001.