| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't Know | 97 |
1.5%
|
| -8 | Refused | 5 |
0.1%
|
| -5 | Not applicable | 0 |
0%
|
| -3 | Missing | 0 |
0%
|
| 1 | Limited duration | 1067 |
16.6%
|
| 2 | Unspecified duration | 1833 |
28.5%
|
| 3 | Permanent | 3436 |
53.4%
|
| Sysmiss | 20381 |