There was moderate variation in the issued sample size for each wave. This varied to meet the target number of returns nationally (176,150) and at a local authority level.
The table outlining the variation in issued sample size can be seen below.
Issued sample size by wave
| Wave | Issued sample size |
|---|---|
| 97 | 47,923 |
| 98 | 48,875 |
| 99 | 48,207 |
| 100 | 49,813 |
| 101 | 58,481 |
| 102 | 58,279 |
| 103 | 58,279 |
| 104 | 56,749 |
| 105 | 57,190 |
| 106 | 58,422 |
| 107 | 61,960 |
| 108 | 53,199 |