Value | Category | Cases | |
---|---|---|---|
-9 | Don't know (spontaneous) | 9 |
2.7%
|
-7 | Never regiestered (spontaneous) | 0 |
0%
|
1960 | 1 |
0.3%
|
|
1968 | 2 |
0.6%
|
|
1978 | 1 |
0.3%
|
|
1981 | 1 |
0.3%
|
|
1983 | 1 |
0.3%
|
|
1984 | 1 |
0.3%
|
|
1985 | 2 |
0.6%
|
|
1986 | 1 |
0.3%
|
|
1987 | 1 |
0.3%
|
|
1988 | 3 |
0.9%
|
|
1989 | 4 |
1.2%
|
|
1990 | 10 |
3%
|
|
1991 | 5 |
1.5%
|
|
1992 | 12 |
3.6%
|
|
1993 | 8 |
2.4%
|
|
1994 | 3 |
0.9%
|
|
1995 | 5 |
1.5%
|
|
1996 | 6 |
1.8%
|
|
1997 | 6 |
1.8%
|
|
1998 | 7 |
2.1%
|
|
1999 | 11 |
3.3%
|
|
2000 | 22 |
6.6%
|
|
2001 | 6 |
1.8%
|
|
2002 | 7 |
2.1%
|
|
2003 | 7 |
2.1%
|
|
2004 | 15 |
4.5%
|
|
2005 | 17 |
5.1%
|
|
2006 | 9 |
2.7%
|
|
2007 | 8 |
2.4%
|
|
2008 | 17 |
5.1%
|
|
2009 | 14 |
4.2%
|
|
2010 | 13 |
3.9%
|
|
2011 | 14 |
4.2%
|
|
2012 | 11 |
3.3%
|
|
2013 | 17 |
5.1%
|
|
2014 | 14 |
4.2%
|
|
2015 | 15 |
4.5%
|
|
2016 | 18 |
5.4%
|
|
2017 | 8 |
2.4%
|