| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 91 |
2.3%
|
| -8 | Refused | 50 |
1.2%
|
| -5 | Not applicable | 0 |
0%
|
| -3 | Missing | 0 |
0%
|
| 1 | A written contract | 2669 |
66.4%
|
| 2 | A verbal agreement | 1207 |
30%
|
| Sysmiss | 17857 |