| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes (immunisation card) | 24778 |
48.1%
|
| 2 | yes (memory) | 25802 |
50.1%
|
| 3 | no | 871 |
1.7%
|
| 4 | do not know | 49 |
0.1%
|
| Sysmiss | 11931 |