| Value | Category | Cases | |
|---|---|---|---|
| 2004 | 11 |
3.5%
|
|
| 2005 | 45 |
14.5%
|
|
| 2006 | 36 |
11.6%
|
|
| 2007 | 7 |
2.3%
|
|
| 2008 | 20 |
6.4%
|
|
| 2009 | 34 |
10.9%
|
|
| 2010 | 21 |
6.8%
|
|
| 2011 | 12 |
3.9%
|
|
| 2012 | 15 |
4.8%
|
|
| 2013 | 34 |
10.9%
|
|
| 2014 | 11 |
3.5%
|
|
| 2015 | 19 |
6.1%
|
|
| 2016 | 29 |
9.3%
|
|
| 2017 | 8 |
2.6%
|
|
| 2018 | 9 |
2.9%
|
|
| Sysmiss | 1029 |