The foundation's official attendance figures are best read in context. Until the 1990s they reflected only general admission tickets sold, and that number was sometimes artificially bolstered by internal year-end sales and new year repurchases between the non-profit foundation and its for-profit wholly owned subsidiary hotels. Afterward, the foundation estimated the number of tourists who walked the streets without purchasing a ticket, and added them to attendance figures. In the 2000s, head counts were adjusted to reflect tourists who rode the foundation's buses, who visited its museums, who bought carriage rides, who went to night programs, and the like. These numbers were reported as "turnstile" counts. From old annual reports, it appears general admission ticket sales have never reached one million.