| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 68 |
54.4%
|
| 6 | 2 |
1.6%
|
|
| 12 | 2 |
1.6%
|
|
| 9888 | Continuing | 53 |
42.4%
|
| Sysmiss | 61 |