| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes (immunisation card) | 17939 |
31.2%
|
| 2 | yes (memory) | 25167 |
43.7%
|
| 3 | no | 14350 |
24.9%
|
| 4 | polio campaign | 117 |
0.2%
|
| Sysmiss | 3399 |