| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 60 |
15.1%
|
| 1012 | 1 |
0.3%
|
|
| 1976 | 2 |
0.5%
|
|
| 1984 | 1 |
0.3%
|
|
| 1985 | 1 |
0.3%
|
|
| 1990 | 1 |
0.3%
|
|
| 1991 | 1 |
0.3%
|
|
| 1993 | 1 |
0.3%
|
|
| 1994 | 1 |
0.3%
|
|
| 1995 | 1 |
0.3%
|
|
| 1996 | 2 |
0.5%
|
|
| 1997 | 2 |
0.5%
|
|
| 1998 | 1 |
0.3%
|
|
| 1999 | 1 |
0.3%
|
|
| 2000 | 1 |
0.3%
|
|
| 2001 | 2 |
0.5%
|
|
| 2002 | 1 |
0.3%
|
|
| 2003 | 1 |
0.3%
|
|
| 2004 | 2 |
0.5%
|
|
| 2005 | 1 |
0.3%
|
|
| 2007 | 2 |
0.5%
|
|
| 2008 | 2 |
0.5%
|
|
| 2009 | 2 |
0.5%
|
|
| 2010 | 8 |
2%
|
|
| 2011 | 6 |
1.5%
|
|
| 2012 | 4 |
1%
|
|
| 2013 | 5 |
1.3%
|
|
| 2014 | 8 |
2%
|
|
| 2015 | 14 |
3.5%
|
|
| 2016 | 20 |
5%
|
|
| 2017 | 10 |
2.5%
|
|
| 2018 | 36 |
9.1%
|
|
| 2019 | 46 |
11.6%
|
|
| 2020 | 49 |
12.3%
|
|
| 2021 | 46 |
11.6%
|
|
| 2022 | 46 |
11.6%
|
|
| 2023 | 9 |
2.3%
|
|
| Sysmiss | 2708 |