| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 1 |
0%
|
| -8 | Refused | 2 |
0.1%
|
| -5 | Not applicable | 2 |
0.1%
|
| -3 | Missing | 60 |
1.6%
|
| 1 | A written contract | 2326 |
60.4%
|
| 2 | A verbal agreement | 1462 |
37.9%
|
| Sysmiss | 13019 |