| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 141 |
14%
|
| 1969 | 1 |
0.1%
|
|
| 1987 | 1 |
0.1%
|
|
| 1990 | 1 |
0.1%
|
|
| 1992 | 1 |
0.1%
|
|
| 1993 | 1 |
0.1%
|
|
| 1994 | 1 |
0.1%
|
|
| 1995 | 1 |
0.1%
|
|
| 1999 | 2 |
0.2%
|
|
| 2000 | 8 |
0.8%
|
|
| 2001 | 1 |
0.1%
|
|
| 2003 | 1 |
0.1%
|
|
| 2004 | 7 |
0.7%
|
|
| 2005 | 3 |
0.3%
|
|
| 2008 | 6 |
0.6%
|
|
| 2009 | 5 |
0.5%
|
|
| 2010 | 12 |
1.2%
|
|
| 2012 | 4 |
0.4%
|
|
| 2013 | 8 |
0.8%
|
|
| 2014 | 5 |
0.5%
|
|
| 2015 | 15 |
1.5%
|
|
| 2016 | 9 |
0.9%
|
|
| 2017 | 6 |
0.6%
|
|
| 2018 | 14 |
1.4%
|
|
| 2019 | 21 |
2.1%
|
|
| 2020 | 74 |
7.4%
|
|
| 2021 | 73 |
7.3%
|
|
| 2022 | 106 |
10.6%
|
|
| 2023 | 197 |
19.6%
|
|
| 2024 | 251 |
25%
|
|
| 2025 | 28 |
2.8%
|
|
| Sysmiss | 1693 |