| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 14 |
8.6%
|
| 1990 | 1 |
0.6%
|
|
| 1995 | 1 |
0.6%
|
|
| 2004 | 1 |
0.6%
|
|
| 2005 | 1 |
0.6%
|
|
| 2010 | 1 |
0.6%
|
|
| 2013 | 2 |
1.2%
|
|
| 2014 | 1 |
0.6%
|
|
| 2015 | 1 |
0.6%
|
|
| 2017 | 2 |
1.2%
|
|
| 2018 | 2 |
1.2%
|
|
| 2019 | 7 |
4.3%
|
|
| 2020 | 12 |
7.4%
|
|
| 2021 | 30 |
18.5%
|
|
| 2022 | 25 |
15.4%
|
|
| 2023 | 48 |
29.6%
|
|
| 2024 | 13 |
8%
|
|
| Sysmiss | 862 |