| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 27 |
2.7%
|
| -7 | Never regiestered (spontaneous) | 0 |
0%
|
| 1912 | 1 |
0.1%
|
|
| 1916 | 2 |
0.2%
|
|
| 1938 | 1 |
0.1%
|
|
| 1960 | 2 |
0.2%
|
|
| 1971 | 1 |
0.1%
|
|
| 1974 | 1 |
0.1%
|
|
| 1975 | 1 |
0.1%
|
|
| 1977 | 1 |
0.1%
|
|
| 1982 | 1 |
0.1%
|
|
| 1988 | 1 |
0.1%
|
|
| 1990 | 1 |
0.1%
|
|
| 1991 | 6 |
0.6%
|
|
| 1992 | 6 |
0.6%
|
|
| 1993 | 6 |
0.6%
|
|
| 1994 | 19 |
1.9%
|
|
| 1995 | 12 |
1.2%
|
|
| 1996 | 11 |
1.1%
|
|
| 1997 | 6 |
0.6%
|
|
| 1998 | 11 |
1.1%
|
|
| 1999 | 4 |
0.4%
|
|
| 2000 | 14 |
1.4%
|
|
| 2001 | 9 |
0.9%
|
|
| 2002 | 9 |
0.9%
|
|
| 2003 | 18 |
1.8%
|
|
| 2004 | 24 |
2.4%
|
|
| 2005 | 22 |
2.2%
|
|
| 2006 | 21 |
2.1%
|
|
| 2007 | 29 |
2.9%
|
|
| 2008 | 30 |
3%
|
|
| 2009 | 48 |
4.8%
|
|
| 2010 | 37 |
3.7%
|
|
| 2011 | 33 |
3.3%
|
|
| 2012 | 19 |
1.9%
|
|
| 2013 | 49 |
4.9%
|
|
| 2014 | 39 |
3.9%
|
|
| 2015 | 47 |
4.7%
|
|
| 2016 | 67 |
6.6%
|
|
| 2017 | 65 |
6.4%
|
|
| 2018 | 74 |
7.3%
|
|
| 2019 | 71 |
7%
|
|
| 2020 | 53 |
5.3%
|
|
| 2021 | 50 |
5%
|
|
| 2022 | 50 |
5%
|
|
| 2023 | 9 |
0.9%
|