| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 6 |
7.2%
|
| 2014 | 1 |
1.2%
|
|
| 2017 | 1 |
1.2%
|
|
| 2018 | 2 |
2.4%
|
|
| 2019 | 5 |
6%
|
|
| 2020 | 8 |
9.6%
|
|
| 2021 | 18 |
21.7%
|
|
| 2022 | 24 |
28.9%
|
|
| 2023 | 18 |
21.7%
|
|
| Sysmiss | 68 |