|North American overnight||52,938,650||54,455,995||58,881,000|
|North American same-day||231,185,000||220,034,000||254,542,000|
SOURCES: Overnight—U.S. Department of Commerce, International Trade Administration, Office of Tourism Industries, "Arrivals to the U.S. 1990-2000," and "U.S. Resident Travel Abroad: Historical Visitation—Outbound 1990-2000 (One or More Nights)," available at http://tinet.ita.doc.gov, as of July 1, 2001.
Same-day—Statistics Canada, International Travel: Travel Between Canada and Other Countries (Touriscope), Catalogue No. 66-201-XPB (Ottawa, Ontario: various years). Banco de México, Dirección General de Investigación Económica, Dirección de Medición Económica, 1999 and 2001.