| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 14 |
5.1%
|
| 1986 | 1 |
0.4%
|
|
| 1999 | 1 |
0.4%
|
|
| 2000 | 3 |
1.1%
|
|
| 2001 | 1 |
0.4%
|
|
| 2004 | 1 |
0.4%
|
|
| 2006 | 1 |
0.4%
|
|
| 2007 | 1 |
0.4%
|
|
| 2008 | 2 |
0.7%
|
|
| 2009 | 2 |
0.7%
|
|
| 2010 | 3 |
1.1%
|
|
| 2011 | 1 |
0.4%
|
|
| 2012 | 1 |
0.4%
|
|
| 2013 | 3 |
1.1%
|
|
| 2014 | 2 |
0.7%
|
|
| 2015 | 4 |
1.5%
|
|
| 2016 | 4 |
1.5%
|
|
| 2017 | 6 |
2.2%
|
|
| 2018 | 14 |
5.1%
|
|
| 2019 | 5 |
1.8%
|
|
| 2020 | 8 |
2.9%
|
|
| 2021 | 16 |
5.9%
|
|
| 2022 | 35 |
12.8%
|
|
| 2023 | 98 |
35.9%
|
|
| 2024 | 46 |
16.8%
|
|
| Sysmiss | 327 |