| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 11 |
2.3%
|
| 2000 | 1 |
0.2%
|
|
| 2003 | 1 |
0.2%
|
|
| 2008 | 1 |
0.2%
|
|
| 2013 | 1 |
0.2%
|
|
| 2015 | 2 |
0.4%
|
|
| 2017 | 1 |
0.2%
|
|
| 2018 | 13 |
2.7%
|
|
| 2019 | 10 |
2.1%
|
|
| 2020 | 30 |
6.2%
|
|
| 2021 | 99 |
20.5%
|
|
| 2022 | 168 |
34.8%
|
|
| 2023 | 143 |
29.6%
|
|
| 2024 | 2 |
0.4%
|
|
| Sysmiss | 436 |