| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 47 |
1%
|
| -8 | Refused | 3 |
0.1%
|
| -5 | Not applicable | 0 |
0%
|
| -3 | Missing | 0 |
0%
|
| 1 | Limited duration | 777 |
16.6%
|
| 2 | Unspecified duration | 1294 |
27.6%
|
| 3 | Permanent | 2565 |
54.7%
|
| Sysmiss | 17780 |