| Value | Category | Cases | |
|---|---|---|---|
| 1 | Written agreement with undetermined duration | 138618 |
36.9%
|
| 2 | Written agreement with fixed duration | 61530 |
16.4%
|
| 3 | Verbal agreement | 88163 |
23.5%
|
| 4 | No | 87040 |
23.2%
|
| Sysmiss | 2709632 |