| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 9 |
25.7%
|
| 1994 | 1 |
2.9%
|
|
| 1999 | 1 |
2.9%
|
|
| 2014 | 2 |
5.7%
|
|
| 2015 | 2 |
5.7%
|
|
| 2018 | 1 |
2.9%
|
|
| 2019 | 1 |
2.9%
|
|
| 2020 | 3 |
8.6%
|
|
| 2021 | 1 |
2.9%
|
|
| 2022 | 4 |
11.4%
|
|
| 2023 | 5 |
14.3%
|
|
| 2024 | 4 |
11.4%
|
|
| 2025 | 1 |
2.9%
|
|
| Sysmiss | 79 |