| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 21 |
31.8%
|
| 8 | 1 |
1.5%
|
|
| 12 | 3 |
4.5%
|
|
| 9888 | Continuing | 41 |
62.1%
|
| Sysmiss | 120 |