| 2002 (n = 569), mean (SD) | 2003 (n = 554), mean (SD) | 2004 (n = 565), mean (SD) | 2005 (n = 574), mean (SD) | |
| Type of advertising | ||||
| Shelving units | 1.4 (1.5) | 1.5 (1.7) | 1.6 (1.9) | 1.4 (1.4) |
| Displays | 1.4 (2.3) | 1.1 (2.1) | 0.9 (1.8) | 0.5 (1.1) |
| Interior signs | 16.7 (22.8) | 16.1 (19.3) | 19.4 (22.6) | 19.2 (29.5) |
| Exterior signs | 2.8 (5.0) | 3.3 (5.9) | 3.7 (6.7) | 3.4 (6.2) |
| Interior and exterior functional items | 0.5 (1.2) | 0.4 (0.9) | 0.4 (1.0) | 0.3 (0.9) |
| Total adverts | 22.7 (25.2) | 22.4 (22.6) | 26.1 (25.2) | 24.9 (31.1) |
| Mean proportion of interior signs and displays with a sales promotion | 27.5% (28.6) | 33.8% (26.5) | 38.8% (33.1) | 31.6% (23.8) |
| Proportion of stores with at least one advert | 93.0% (95.3) | 92.9% (94.3) | 92.9% | 94.3% |
| Proportion of stores with at least one sales promotion | 68.4% (76.7) | 74.3% (79.6) | 74.3% | 74.6% |
*Advertising includes interior signs, exterior signs, shelving units, displays, and interior and exterior functional items.
†Sales promotions include special price or multi-pack discount.