| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
2.5%
|
| 2005 | 1 |
0.5%
|
|
| 2011 | 1 |
0.5%
|
|
| 2012 | 1 |
0.5%
|
|
| 2014 | 4 |
2%
|
|
| 2016 | 1 |
0.5%
|
|
| 2017 | 2 |
1%
|
|
| 2018 | 3 |
1.5%
|
|
| 2019 | 4 |
2%
|
|
| 2020 | 13 |
6.6%
|
|
| 2021 | 21 |
10.6%
|
|
| 2022 | 26 |
13.1%
|
|
| 2023 | 61 |
30.8%
|
|
| 2024 | 55 |
27.8%
|
|
| Sysmiss | 163 |