| Value | Category | Cases | |
|---|---|---|---|
| -9 | Refused to answer | 0 |
0%
|
| -8 | Don't know | 4 |
0.1%
|
| 1 | Formal written contract | 203 |
3.9%
|
| 2 | Oral with witness | 128 |
2.4%
|
| 3 | Oral without witness | 466 |
8.9%
|
| 4 | Other (specify) | 29 |
0.6%
|
| Missing value | 4414 |
84.2%
|