| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| -7 | Never regiestered (spontaneous) | 0 |
0%
|
| 1990 | 1 |
0.2%
|
|
| 1991 | 1 |
0.2%
|
|
| 1992 | 1 |
0.2%
|
|
| 1994 | 1 |
0.2%
|
|
| 1995 | 2 |
0.4%
|
|
| 1998 | 4 |
0.8%
|
|
| 1999 | 1 |
0.2%
|
|
| 2000 | 15 |
2.9%
|
|
| 2001 | 13 |
2.5%
|
|
| 2002 | 11 |
2.1%
|
|
| 2003 | 4 |
0.8%
|
|
| 2004 | 10 |
1.9%
|
|
| 2005 | 18 |
3.5%
|
|
| 2006 | 8 |
1.5%
|
|
| 2007 | 8 |
1.5%
|
|
| 2008 | 13 |
2.5%
|
|
| 2009 | 17 |
3.3%
|
|
| 2010 | 25 |
4.8%
|
|
| 2011 | 13 |
2.5%
|
|
| 2012 | 24 |
4.6%
|
|
| 2013 | 29 |
5.6%
|
|
| 2014 | 27 |
5.2%
|
|
| 2015 | 36 |
6.9%
|
|
| 2016 | 40 |
7.7%
|
|
| 2017 | 53 |
10.2%
|
|
| 2018 | 78 |
15%
|
|
| 2019 | 44 |
8.5%
|
|
| 2020 | 21 |
4%
|
|
| 2021 | 1 |
0.2%
|