| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
5.8%
|
| 1999 | 1 |
1.4%
|
|
| 2005 | 1 |
1.4%
|
|
| 2006 | 1 |
1.4%
|
|
| 2011 | 1 |
1.4%
|
|
| 2014 | 1 |
1.4%
|
|
| 2015 | 1 |
1.4%
|
|
| 2017 | 1 |
1.4%
|
|
| 2018 | 1 |
1.4%
|
|
| 2019 | 1 |
1.4%
|
|
| 2020 | 3 |
4.3%
|
|
| 2021 | 3 |
4.3%
|
|
| 2022 | 6 |
8.7%
|
|
| 2023 | 25 |
36.2%
|
|
| 2024 | 19 |
27.5%
|
|
| Sysmiss | 81 |