| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes (immunisation card) | 20244 |
39.3%
|
| 2 | yes (memory) | 22517 |
43.7%
|
| 3 | no | 8319 |
16.2%
|
| 4 | do not know | 420 |
0.8%
|
| Sysmiss | 11931 |