Value | Category | Cases | |
---|---|---|---|
-9 | Don't know (spontaneous) | 0 |
0%
|
1989 | 1 |
0.9%
|
|
1995 | 1 |
0.9%
|
|
1998 | 2 |
1.8%
|
|
1999 | 1 |
0.9%
|
|
2000 | 8 |
7.2%
|
|
2002 | 2 |
1.8%
|
|
2003 | 1 |
0.9%
|
|
2004 | 1 |
0.9%
|
|
2005 | 6 |
5.4%
|
|
2006 | 6 |
5.4%
|
|
2007 | 4 |
3.6%
|
|
2008 | 9 |
8.1%
|
|
2009 | 5 |
4.5%
|
|
2010 | 12 |
10.8%
|
|
2011 | 1 |
0.9%
|
|
2012 | 17 |
15.3%
|
|
2013 | 9 |
8.1%
|
|
2014 | 10 |
9%
|
|
2015 | 9 |
8.1%
|
|
2016 | 5 |
4.5%
|
|
2017 | 1 |
0.9%
|