| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 28 |
5%
|
| 2000 | 1 |
0.2%
|
|
| 2002 | 1 |
0.2%
|
|
| 2005 | 1 |
0.2%
|
|
| 2007 | 1 |
0.2%
|
|
| 2009 | 2 |
0.4%
|
|
| 2010 | 4 |
0.7%
|
|
| 2011 | 1 |
0.2%
|
|
| 2012 | 2 |
0.4%
|
|
| 2013 | 6 |
1.1%
|
|
| 2014 | 2 |
0.4%
|
|
| 2015 | 4 |
0.7%
|
|
| 2016 | 4 |
0.7%
|
|
| 2017 | 7 |
1.2%
|
|
| 2018 | 18 |
3.2%
|
|
| 2019 | 25 |
4.5%
|
|
| 2020 | 56 |
10%
|
|
| 2021 | 89 |
15.9%
|
|
| 2022 | 237 |
42.2%
|
|
| 2023 | 72 |
12.8%
|
|
| Sysmiss | 270 |