| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 55 |
18.3%
|
| 2008 | 2 |
0.7%
|
|
| 2010 | 1 |
0.3%
|
|
| 2011 | 1 |
0.3%
|
|
| 2012 | 1 |
0.3%
|
|
| 2013 | 1 |
0.3%
|
|
| 2014 | 1 |
0.3%
|
|
| 2015 | 2 |
0.7%
|
|
| 2016 | 1 |
0.3%
|
|
| 2017 | 1 |
0.3%
|
|
| 2018 | 2 |
0.7%
|
|
| 2019 | 3 |
1%
|
|
| 2020 | 12 |
4%
|
|
| 2021 | 17 |
5.7%
|
|
| 2022 | 36 |
12%
|
|
| 2023 | 72 |
24%
|
|
| 2024 | 92 |
30.7%
|
|
| Sysmiss | 202 |