| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes (immunisation card) | 19205 |
33.4%
|
| 2 | yes (memory) | 26831 |
46.6%
|
| 3 | no | 11279 |
19.6%
|
| 4 | polio campaign | 258 |
0.4%
|
| Sysmiss | 3399 |