| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 0 |
0%
|
| -8 | Refused | 3 |
1.2%
|
| -5 | Not applicable | 0 |
0%
|
| -3 | Missing | 0 |
0%
|
| 1 | A written contract | 192 |
75.9%
|
| 2 | A verbal agreement | 58 |
22.9%
|
| Sysmiss | 746 |