| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 2012 | 4 |
4.5%
|
|
| 2013 | 1 |
1.1%
|
|
| 2014 | 1 |
1.1%
|
|
| 2018 | 5 |
5.6%
|
|
| 2020 | 8 |
9%
|
|
| 2021 | 9 |
10.1%
|
|
| 2022 | 24 |
27%
|
|
| 2023 | 18 |
20.2%
|
|
| 2024 | 18 |
20.2%
|
|
| 2025 | 1 |
1.1%
|
|
| Sysmiss | 274 |