| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 84 |
53.8%
|
| 6 | 2 |
1.3%
|
|
| 12 | 4 |
2.6%
|
|
| 9888 | Continuing | 66 |
42.3%
|
| Sysmiss | 30 |