Trips of one or more nights
NOTE: Data for Canada and Mexico do not include same-day travel.
SOURCES: U.S. Department of Commerce, International Trade Administration, Office of Tourism Industries, International Visitors (Inbound) and U.S. Residents (Outbound): 1990-2000 (Washington, DC: 2001); _____. Arrivals to the U.S. 1999-1998 (All Countries by Residency) (Washington, DC: 2000).