| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes (immunisation card) | 19928 |
34.6%
|
| 2 | yes (memory) | 23318 |
40.5%
|
| 3 | no | 13876 |
24.1%
|
| 4 | polio campaign | 451 |
0.8%
|
| Sysmiss | 3399 |