| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, written contract | 1001 |
39.4%
|
| 2 | Yes, oral agreement | 849 |
33.5%
|
| 3 | No | 624 |
24.6%
|
| 4 | Don't know | 64 |
2.5%
|
| Sysmiss | 9675 |