| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes (immunisation card) | 22405 |
43.5%
|
| 2 | yes (memory) | 25348 |
49.2%
|
| 3 | no | 3675 |
7.1%
|
| 4 | do not know | 72 |
0.1%
|
| Sysmiss | 11931 |