| Value | Category | Cases | |
|---|---|---|---|
| -98 | Don't Know | 28 |
2%
|
| 1 | From birth | 3 |
0.2%
|
| 2 | After 1 month old | 4 |
0.3%
|
| 3 | After 3 months old | 46 |
3.2%
|
| 4 | After 6 months old | 1352 |
94.3%
|
| Sysmiss | 776 |