| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 35 |
3.9%
|
| 1965 | 1 |
0.1%
|
|
| 1985 | 1 |
0.1%
|
|
| 1997 | 1 |
0.1%
|
|
| 2000 | 1 |
0.1%
|
|
| 2006 | 1 |
0.1%
|
|
| 2010 | 2 |
0.2%
|
|
| 2011 | 1 |
0.1%
|
|
| 2012 | 2 |
0.2%
|
|
| 2014 | 5 |
0.6%
|
|
| 2016 | 6 |
0.7%
|
|
| 2017 | 3 |
0.3%
|
|
| 2018 | 4 |
0.4%
|
|
| 2019 | 19 |
2.1%
|
|
| 2020 | 71 |
7.9%
|
|
| 2021 | 80 |
8.9%
|
|
| 2022 | 173 |
19.2%
|
|
| 2023 | 311 |
34.6%
|
|
| 2024 | 183 |
20.3%
|
|
| Sysmiss | 316 |