| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 169 |
0.6%
|
| 1965 | 1 |
0%
|
|
| 1973 | 1 |
0%
|
|
| 1978 | 1 |
0%
|
|
| 1980 | 1 |
0%
|
|
| 1986 | 1 |
0%
|
|
| 1989 | 1 |
0%
|
|
| 1990 | 5 |
0%
|
|
| 1991 | 2 |
0%
|
|
| 1992 | 1 |
0%
|
|
| 1994 | 3 |
0%
|
|
| 1995 | 7 |
0%
|
|
| 1996 | 2 |
0%
|
|
| 1997 | 2 |
0%
|
|
| 1998 | 10 |
0%
|
|
| 1999 | 5 |
0%
|
|
| 2000 | 42 |
0.1%
|
|
| 2001 | 23 |
0.1%
|
|
| 2002 | 31 |
0.1%
|
|
| 2003 | 36 |
0.1%
|
|
| 2004 | 32 |
0.1%
|
|
| 2005 | 88 |
0.3%
|
|
| 2006 | 73 |
0.3%
|
|
| 2007 | 60 |
0.2%
|
|
| 2008 | 109 |
0.4%
|
|
| 2009 | 129 |
0.4%
|
|
| 2010 | 351 |
1.2%
|
|
| 2011 | 528 |
1.8%
|
|
| 2012 | 621 |
2.1%
|
|
| 2013 | 595 |
2%
|
|
| 2014 | 32 |
0.1%
|
|
| 2015 | 111 |
0.4%
|
|
| 2016 | 99 |
0.3%
|
|
| 2017 | 104 |
0.4%
|
|
| 2018 | 230 |
0.8%
|
|
| 2019 | 172 |
0.6%
|
|
| 2020 | 225 |
0.8%
|
|
| 2021 | 619 |
2.1%
|
|
| 2022 | 839 |
2.9%
|
|
| 2023 | 1031 |
3.5%
|
|
| 2024 | 809 |
2.8%
|
|
| 2025 | 42 |
0.1%
|
|
| Sysmiss | 21893 |
75.1%
|