Notes/Sources:
(1) Washington Convention & Tourism Corporation/TIA TravelScope (2005, see "TravelScope Methodology" for more information)
(2) DC Office of Research & Analysis/Smith Travel (2005)
(3) DC Office of Research & Analysis (FY 2002)
(4) Restaurant Association of Metropolitan Washington (2003)
(5) Smithsonian (2004, see "Smithsonian Visitation" for methodology)
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