| Value | Category | Cases | |
|---|---|---|---|
| 1 | Written | 144 |
8.7%
|
| 2 | Oral | 902 |
54.2%
|
| 3 | No contract | 557 |
33.5%
|
| 4 | Not Applicable | 60 |
3.6%
|
| 9 | Not specified | 1 |
0.1%
|