| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes (immunisation card) | 20275 |
35.2%
|
| 2 | yes (memory) | 24992 |
43.4%
|
| 3 | no | 781 |
1.4%
|
| 4 | polio campaign | 11525 |
20%
|
| Sysmiss | 3399 |