| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 160 |
4.4%
|
| 1965 | 1 |
0%
|
|
| 1973 | 1 |
0%
|
|
| 1978 | 1 |
0%
|
|
| 1980 | 1 |
0%
|
|
| 1986 | 1 |
0%
|
|
| 1989 | 1 |
0%
|
|
| 1990 | 5 |
0.1%
|
|
| 1991 | 2 |
0.1%
|
|
| 1992 | 1 |
0%
|
|
| 1994 | 3 |
0.1%
|
|
| 1995 | 7 |
0.2%
|
|
| 1996 | 2 |
0.1%
|
|
| 1997 | 2 |
0.1%
|
|
| 1998 | 10 |
0.3%
|
|
| 1999 | 5 |
0.1%
|
|
| 2000 | 23 |
0.6%
|
|
| 2001 | 15 |
0.4%
|
|
| 2002 | 15 |
0.4%
|
|
| 2003 | 29 |
0.8%
|
|
| 2004 | 24 |
0.7%
|
|
| 2005 | 68 |
1.9%
|
|
| 2006 | 67 |
1.8%
|
|
| 2007 | 52 |
1.4%
|
|
| 2008 | 88 |
2.4%
|
|
| 2009 | 122 |
3.4%
|
|
| 2010 | 304 |
8.4%
|
|
| 2011 | 515 |
14.2%
|
|
| 2012 | 588 |
16.2%
|
|
| 2013 | 582 |
16%
|
|
| 2014 | 19 |
0.5%
|
|
| 2015 | 66 |
1.8%
|
|
| 2016 | 54 |
1.5%
|
|
| 2017 | 70 |
1.9%
|
|
| 2018 | 126 |
3.5%
|
|
| 2019 | 89 |
2.4%
|
|
| 2020 | 141 |
3.9%
|
|
| 2021 | 375 |
10.3%
|
|
| Sysmiss | 15022 |