| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
2.1%
|
| 1996 | 1 |
0.3%
|
|
| 2011 | 1 |
0.3%
|
|
| 2012 | 1 |
0.3%
|
|
| 2013 | 1 |
0.3%
|
|
| 2014 | 1 |
0.3%
|
|
| 2015 | 1 |
0.3%
|
|
| 2016 | 3 |
0.9%
|
|
| 2017 | 9 |
2.7%
|
|
| 2018 | 17 |
5%
|
|
| 2019 | 18 |
5.3%
|
|
| 2020 | 26 |
7.7%
|
|
| 2021 | 41 |
12.1%
|
|
| 2022 | 126 |
37.3%
|
|
| 2023 | 85 |
25.1%
|
|
| Sysmiss | 254 |