| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
1.7%
|
| 2015 | 1 |
0.6%
|
|
| 2017 | 1 |
0.6%
|
|
| 2019 | 5 |
2.8%
|
|
| 2020 | 11 |
6.2%
|
|
| 2021 | 15 |
8.4%
|
|
| 2022 | 27 |
15.2%
|
|
| 2023 | 46 |
25.8%
|
|
| 2024 | 69 |
38.8%
|
|
| Sysmiss | 197 |