| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes (immunisation card) | 22482 |
43.7%
|
| 2 | yes (memory) | 24506 |
47.6%
|
| 3 | no | 4403 |
8.5%
|
| 4 | do not know | 109 |
0.2%
|
| Sysmiss | 11931 |