| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 25 |
1.9%
|
| -7 | Never regiestered (spontaneous) | 0 |
0%
|
| 1817 | 1 |
0.1%
|
|
| 1936 | 1 |
0.1%
|
|
| 1952 | 2 |
0.2%
|
|
| 1954 | 1 |
0.1%
|
|
| 1957 | 1 |
0.1%
|
|
| 1958 | 1 |
0.1%
|
|
| 1962 | 1 |
0.1%
|
|
| 1965 | 1 |
0.1%
|
|
| 1967 | 2 |
0.2%
|
|
| 1973 | 2 |
0.2%
|
|
| 1974 | 2 |
0.2%
|
|
| 1975 | 1 |
0.1%
|
|
| 1976 | 1 |
0.1%
|
|
| 1982 | 1 |
0.1%
|
|
| 1986 | 2 |
0.2%
|
|
| 1991 | 6 |
0.5%
|
|
| 1992 | 15 |
1.1%
|
|
| 1993 | 22 |
1.7%
|
|
| 1994 | 12 |
0.9%
|
|
| 1995 | 5 |
0.4%
|
|
| 1996 | 9 |
0.7%
|
|
| 1997 | 15 |
1.1%
|
|
| 1998 | 17 |
1.3%
|
|
| 1999 | 27 |
2%
|
|
| 2000 | 20 |
1.5%
|
|
| 2001 | 20 |
1.5%
|
|
| 2002 | 201 |
15.2%
|
|
| 2003 | 95 |
7.2%
|
|
| 2004 | 60 |
4.5%
|
|
| 2005 | 62 |
4.7%
|
|
| 2006 | 65 |
4.9%
|
|
| 2007 | 68 |
5.1%
|
|
| 2008 | 65 |
4.9%
|
|
| 2009 | 52 |
3.9%
|
|
| 2010 | 50 |
3.8%
|
|
| 2011 | 58 |
4.4%
|
|
| 2012 | 64 |
4.8%
|
|
| 2013 | 50 |
3.8%
|
|
| 2014 | 58 |
4.4%
|
|
| 2015 | 64 |
4.8%
|
|
| 2016 | 53 |
4%
|
|
| 2017 | 41 |
3.1%
|
|
| 2018 | 4 |
0.3%
|