| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes (immunisation card) | 18421 |
32%
|
| 2 | yes (memory) | 22708 |
39.4%
|
| 3 | no | 16306 |
28.3%
|
| 4 | polio campaign | 138 |
0.2%
|
| Sysmiss | 3399 |