Frequency of campaigns per forward sortation area (FSA): proportion of campaigns belonging to each quintile
| Income quintile | Number of FSA | Percentage (FSA) | Number of campaigns | Percentage (campaigns) |
| 1–5 | 114 | 64.77 | 247 | 13.81 |
| 6–17 | 36 | 20.45 | 337 | 18.85 |
| 18–41 | 16 | 9.09 | 402 | 22.48 |
| 42–76 | 6 | 3.41 | 362 | 20.25 |
| 77–138 | 4 | 2.27 | 440 | 24.61 |
| Total | 176 | 100.00 | 1788 | 100.00 |