| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 40 |
0.6%
|
| -8 | Refused | 18 |
0.3%
|
| -5 | Not applicable | 0 |
0%
|
| -3 | Missing | 0 |
0%
|
| 1 | A written contract | 4639 |
72.1%
|
| 2 | A verbal agreement | 1737 |
27%
|
| Sysmiss | 20370 |