| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
0.8%
|
| -7 | Never regiestered (spontaneous) | 0 |
0%
|
| 1970 | 1 |
0.2%
|
|
| 1979 | 2 |
0.3%
|
|
| 1980 | 1 |
0.2%
|
|
| 1989 | 1 |
0.2%
|
|
| 1990 | 3 |
0.5%
|
|
| 1991 | 1 |
0.2%
|
|
| 1992 | 2 |
0.3%
|
|
| 1993 | 1 |
0.2%
|
|
| 1994 | 2 |
0.3%
|
|
| 1995 | 3 |
0.5%
|
|
| 1996 | 5 |
0.8%
|
|
| 1997 | 1 |
0.2%
|
|
| 1998 | 6 |
1%
|
|
| 2000 | 21 |
3.4%
|
|
| 2001 | 7 |
1.1%
|
|
| 2002 | 7 |
1.1%
|
|
| 2003 | 9 |
1.5%
|
|
| 2004 | 13 |
2.1%
|
|
| 2005 | 8 |
1.3%
|
|
| 2006 | 9 |
1.5%
|
|
| 2007 | 11 |
1.8%
|
|
| 2008 | 12 |
2%
|
|
| 2009 | 15 |
2.5%
|
|
| 2010 | 19 |
3.1%
|
|
| 2011 | 10 |
1.6%
|
|
| 2012 | 21 |
3.4%
|
|
| 2013 | 23 |
3.8%
|
|
| 2014 | 40 |
6.5%
|
|
| 2015 | 39 |
6.4%
|
|
| 2016 | 46 |
7.5%
|
|
| 2017 | 49 |
8%
|
|
| 2018 | 67 |
10.9%
|
|
| 2019 | 75 |
12.3%
|
|
| 2020 | 51 |
8.3%
|
|
| 2021 | 24 |
3.9%
|
|
| 2022 | 2 |
0.3%
|