| Value | Category | Cases | |
|---|---|---|---|
| 1 | 3 months | 3 |
23.1%
|
| 2 | 6 months | 9 |
69.2%
|
| 3 | 9 months | 1 |
7.7%
|
| 5 | Other, specify: | 0 |
0%
|
| 8 | Unknown | 0 |
0%
|
| Sysmiss | 928 |