| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 123 |
32.7%
|
| 2000 | 2 |
0.5%
|
|
| 2001 | 2 |
0.5%
|
|
| 2002 | 3 |
0.8%
|
|
| 2004 | 1 |
0.3%
|
|
| 2005 | 1 |
0.3%
|
|
| 2007 | 2 |
0.5%
|
|
| 2008 | 3 |
0.8%
|
|
| 2010 | 7 |
1.9%
|
|
| 2011 | 3 |
0.8%
|
|
| 2012 | 3 |
0.8%
|
|
| 2013 | 1 |
0.3%
|
|
| 2014 | 5 |
1.3%
|
|
| 2015 | 13 |
3.5%
|
|
| 2016 | 11 |
2.9%
|
|
| 2017 | 7 |
1.9%
|
|
| 2018 | 15 |
4%
|
|
| 2019 | 22 |
5.9%
|
|
| 2020 | 36 |
9.6%
|
|
| 2021 | 87 |
23.1%
|
|
| 2022 | 29 |
7.7%
|
|
| Sysmiss | 622 |