| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 17 |
44.7%
|
| 9 | 1 |
2.6%
|
|
| 10 | 1 |
2.6%
|
|
| 12 | 1 |
2.6%
|
|
| 9888 | Continuing | 18 |
47.4%
|
| Sysmiss | 148 |