| Value | Category | Cases | |
|---|---|---|---|
| 2002 | 1 |
0.5%
|
|
| 2005 | 1 |
0.5%
|
|
| 2006 | 2 |
1.1%
|
|
| 2007 | 2 |
1.1%
|
|
| 2008 | 17 |
9.1%
|
|
| 2009 | 43 |
23%
|
|
| 2010 | 37 |
19.8%
|
|
| 2011 | 13 |
7%
|
|
| 2012 | 13 |
7%
|
|
| 2013 | 25 |
13.4%
|
|
| 2014 | 16 |
8.6%
|
|
| 2015 | 12 |
6.4%
|
|
| 2016 | 5 |
2.7%
|
|
| Sysmiss | 45 |