NPD points out that in the twelve months ending September 2007, while digital still camera unit sales were up 20%, revenue increased by only 3%. Concurrently revenues from camera accessories (e.g., lenses, batteries, external flashes, filters and tripods) increased more than 50% during the same time period. DSLR camera buyers are far more likely to purchase accessories than are consumers who purchase simpler point-and-shoot digital cameras. Still, 69% of point-and-shoot digital camera consumers and 54% of DSLR buyers left the store without purchasing anything beyond what was included in the initial purchase price of their new digital cameras.