| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes (immunisation card) | 23380 |
45.4%
|
| 2 | yes (memory) | 24961 |
48.5%
|
| 3 | no | 3069 |
6%
|
| 4 | do not know | 90 |
0.2%
|
| Sysmiss | 11931 |