| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 17 |
0.4%
|
| -8 | Refused | 4 |
0.1%
|
| -5 | Not applicable | 0 |
0%
|
| -3 | Missing | 0 |
0%
|
| 1 | A written contract | 3375 |
72%
|
| 2 | A verbal contract | 1290 |
27.5%
|
| Sysmiss | 17780 |