| Value | Category | Cases | |
|---|---|---|---|
| -888 | don't know | 0 |
0%
|
| 1 | before | 18 |
69.2%
|
| 2 | after | 8 |
30.8%
|
| Sysmiss | Don't know | 0 | |
| Sysmiss | Not applicable | 0 | |
| Sysmiss | Others | 0 | |
| Sysmiss | Can't reveal | 0 | |
| Sysmiss | 4177 |