| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 64 |
0.9%
|
| -8 | Refused | 17 |
0.2%
|
| -5 | Not applicable | 0 |
0%
|
| -3 | Missing | 3 |
0%
|
| 1 | Limited duration | 1015 |
14.6%
|
| 2 | Unspecified duration | 1912 |
27.4%
|
| 3 | Permanent | 3958 |
56.8%
|
| Sysmiss | 23141 |