| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 8 |
19%
|
| -8 | Refused | 0 |
0%
|
| -5 | Not applicable | 0 |
0%
|
| -3 | Missing | 19 |
45.2%
|
| 1 | Days | 2 |
4.8%
|
| 2 | Months | 7 |
16.7%
|
| 3 | Years | 6 |
14.3%
|
| Sysmiss | 16830 |