| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 46 |
7.5%
|
| 1993 | 1 |
0.2%
|
|
| 1998 | 1 |
0.2%
|
|
| 2000 | 1 |
0.2%
|
|
| 2001 | 1 |
0.2%
|
|
| 2002 | 1 |
0.2%
|
|
| 2004 | 1 |
0.2%
|
|
| 2005 | 2 |
0.3%
|
|
| 2007 | 1 |
0.2%
|
|
| 2008 | 2 |
0.3%
|
|
| 2009 | 2 |
0.3%
|
|
| 2010 | 9 |
1.5%
|
|
| 2011 | 1 |
0.2%
|
|
| 2012 | 1 |
0.2%
|
|
| 2013 | 2 |
0.3%
|
|
| 2014 | 4 |
0.6%
|
|
| 2015 | 9 |
1.5%
|
|
| 2016 | 6 |
1%
|
|
| 2017 | 10 |
1.6%
|
|
| 2018 | 15 |
2.4%
|
|
| 2019 | 23 |
3.7%
|
|
| 2020 | 68 |
11%
|
|
| 2021 | 64 |
10.4%
|
|
| 2022 | 142 |
23%
|
|
| 2023 | 110 |
17.8%
|
|
| 2024 | 94 |
15.2%
|
|
| Sysmiss | 1108 |