| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.3%
|
| 1999 | 3 |
0.9%
|
|
| 2000 | 3 |
0.9%
|
|
| 2001 | 1 |
0.3%
|
|
| 2006 | 1 |
0.3%
|
|
| 2008 | 1 |
0.3%
|
|
| 2009 | 2 |
0.6%
|
|
| 2010 | 3 |
0.9%
|
|
| 2011 | 1 |
0.3%
|
|
| 2012 | 1 |
0.3%
|
|
| 2013 | 1 |
0.3%
|
|
| 2015 | 4 |
1.2%
|
|
| 2016 | 4 |
1.2%
|
|
| 2017 | 2 |
0.6%
|
|
| 2018 | 6 |
1.8%
|
|
| 2019 | 12 |
3.6%
|
|
| 2020 | 40 |
11.9%
|
|
| 2021 | 55 |
16.3%
|
|
| 2022 | 90 |
26.7%
|
|
| 2023 | 103 |
30.6%
|
|
| 2024 | 3 |
0.9%
|
|
| Sysmiss | 51 |