| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
1.4%
|
| -8 | Refusal (spontaneous) | 7 |
1.9%
|
| 0 | No payments or gifts are paid | 352 |
95.9%
|
| 15 | 1 |
0.3%
|
|
| 20 | 1 |
0.3%
|
|
| 30 | 1 |
0.3%
|
|
| Sysmiss | 1 |