Harry Potter and the Deathly Hallows Part 2 set no records for 3D ticket sales, BTIG media analyst Richard Greenfield indciated in a note to clients on Monday. Greenfield observed that only 43 percent of the film's gross came from 3D sales (including 9 percent from IMAX). Only 34 percent of the audience chose to buy 3D tickets (28 percent for non-IMAX 3D). Greenfield surmises that if more theaters had shown the film in 2D or that the existing 2D theaters had been larger, the percentage of 3D ticket-buyers would have been even lower. "3D has collapsed in the United States," Greenfield wrote. "We expect international 3D box [office] to trend down over time to reach similar levels to the United States."