| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1983 | 1 |
0.2%
|
|
| 1987 | 1 |
0.2%
|
|
| 1988 | 1 |
0.2%
|
|
| 1991 | 1 |
0.2%
|
|
| 1993 | 3 |
0.7%
|
|
| 1995 | 1 |
0.2%
|
|
| 1997 | 4 |
1%
|
|
| 1998 | 1 |
0.2%
|
|
| 1999 | 3 |
0.7%
|
|
| 2000 | 1 |
0.2%
|
|
| 2001 | 3 |
0.7%
|
|
| 2002 | 4 |
1%
|
|
| 2003 | 12 |
2.9%
|
|
| 2004 | 3 |
0.7%
|
|
| 2005 | 5 |
1.2%
|
|
| 2006 | 5 |
1.2%
|
|
| 2007 | 4 |
1%
|
|
| 2008 | 14 |
3.4%
|
|
| 2009 | 4 |
1%
|
|
| 2010 | 6 |
1.5%
|
|
| 2011 | 11 |
2.7%
|
|
| 2012 | 6 |
1.5%
|
|
| 2013 | 24 |
5.8%
|
|
| 2014 | 3 |
0.7%
|
|
| 2015 | 22 |
5.4%
|
|
| 2016 | 20 |
4.9%
|
|
| 2017 | 27 |
6.6%
|
|
| 2018 | 42 |
10.2%
|
|
| 2019 | 34 |
8.3%
|
|
| 2020 | 22 |
5.4%
|
|
| 2021 | 33 |
8%
|
|
| 2022 | 45 |
10.9%
|
|
| 2023 | 36 |
8.8%
|
|
| 2024 | 9 |
2.2%
|
|
| Sysmiss | 2124 |