| Value | Category | Cases | |
|---|---|---|---|
| 1 | Treated | 30649 |
96.9%
|
| 2 | Untreated | 581 |
1.8%
|
| 3 | Don't know | 398 |
1.3%
|
| Sysmiss | [.a] invalid code | 0 | |
| Sysmiss | 8980 |