NOTE FOR DATA ON THIS PAGE: The
data for incoming trucks exceeds the data for truck containers loaded and
unloaded (empty) because some incoming trucks do not carry a container.
SOURCE FOR DATA ON THIS PAGE: U.S.
Department of Transportation, Research and Innovative Technology
Administration, Bureau of Transportation Statistics, Border Crossing/Entry
data, available at http://www.bts.gov/itt/ as of Sept. 12, 2006.