| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 11 |
5.8%
|
| 2005 | 1 |
0.5%
|
|
| 2007 | 1 |
0.5%
|
|
| 2008 | 1 |
0.5%
|
|
| 2009 | 1 |
0.5%
|
|
| 2012 | 1 |
0.5%
|
|
| 2013 | 2 |
1%
|
|
| 2014 | 3 |
1.6%
|
|
| 2016 | 1 |
0.5%
|
|
| 2017 | 4 |
2.1%
|
|
| 2018 | 9 |
4.7%
|
|
| 2019 | 13 |
6.8%
|
|
| 2020 | 16 |
8.4%
|
|
| 2021 | 19 |
9.9%
|
|
| 2022 | 38 |
19.9%
|
|
| 2023 | 70 |
36.6%
|
|
| Sysmiss | 167 |