| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes (immunisation card) | 18556 |
32.2%
|
| 2 | yes (memory) | 24126 |
41.9%
|
| 3 | no | 3456 |
6%
|
| 4 | polio campaign | 11435 |
19.9%
|
| Sysmiss | 3399 |