| Value | Category | Cases | |
|---|---|---|---|
| 2004 | 8 |
3.2%
|
|
| 2005 | 7 |
2.8%
|
|
| 2006 | 11 |
4.4%
|
|
| 2007 | 12 |
4.8%
|
|
| 2008 | 13 |
5.2%
|
|
| 2009 | 14 |
5.6%
|
|
| 2010 | 25 |
10%
|
|
| 2011 | 22 |
8.8%
|
|
| 2012 | 23 |
9.2%
|
|
| 2013 | 21 |
8.4%
|
|
| 2014 | 33 |
13.3%
|
|
| 2015 | 60 |
24.1%
|
|
| Sysmiss | 2338 |