| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 16 |
11.9%
|
| 2018 | 1 |
0.7%
|
|
| 2019 | 2 |
1.5%
|
|
| 2020 | 8 |
6%
|
|
| 2021 | 15 |
11.2%
|
|
| 2022 | 34 |
25.4%
|
|
| 2023 | 49 |
36.6%
|
|
| 2024 | 9 |
6.7%
|
|
| Sysmiss | 874 |