| Value | Category | Cases | |
|---|---|---|---|
| -998 | Dont know | 84 |
71.8%
|
| -888 | Other (specify:) | 1 |
0.9%
|
| 1 | Between 16-24 months (1.5 to 2 years) | 32 |
27.4%
|
| Sysmiss | 3 |