| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
2.5%
|
| 2008 | 1 |
0.6%
|
|
| 2015 | 1 |
0.6%
|
|
| 2016 | 1 |
0.6%
|
|
| 2017 | 1 |
0.6%
|
|
| 2018 | 2 |
1.2%
|
|
| 2019 | 5 |
3.1%
|
|
| 2020 | 17 |
10.5%
|
|
| 2021 | 22 |
13.6%
|
|
| 2022 | 70 |
43.2%
|
|
| 2023 | 33 |
20.4%
|
|
| 2024 | 5 |
3.1%
|
|
| Sysmiss | 130 |