Value | Category | Cases | |
---|---|---|---|
-9 | Don't know (spontaneous) | 1 |
0.3%
|
1933 | 1 |
0.3%
|
|
1990 | 2 |
0.5%
|
|
1991 | 5 |
1.3%
|
|
1992 | 9 |
2.4%
|
|
1993 | 16 |
4.2%
|
|
1994 | 27 |
7.2%
|
|
1995 | 18 |
4.8%
|
|
1996 | 14 |
3.7%
|
|
1997 | 9 |
2.4%
|
|
1998 | 12 |
3.2%
|
|
1999 | 10 |
2.7%
|
|
2000 | 13 |
3.4%
|
|
2001 | 13 |
3.4%
|
|
2002 | 10 |
2.7%
|
|
2003 | 18 |
4.8%
|
|
2004 | 12 |
3.2%
|
|
2005 | 11 |
2.9%
|
|
2006 | 22 |
5.8%
|
|
2007 | 14 |
3.7%
|
|
2008 | 15 |
4%
|
|
2009 | 13 |
3.4%
|
|
2010 | 10 |
2.7%
|
|
2011 | 13 |
3.4%
|
|
2012 | 11 |
2.9%
|
|
2013 | 13 |
3.4%
|
|
2014 | 16 |
4.2%
|
|
2015 | 16 |
4.2%
|
|
2016 | 19 |
5%
|
|
2017 | 14 |
3.7%
|