| Value | Category | Cases | |
|---|---|---|---|
| 2007 | 5 |
1.5%
|
|
| 2008 | 22 |
6.8%
|
|
| 2009 | 38 |
11.7%
|
|
| 2010 | 29 |
8.9%
|
|
| 2011 | 47 |
14.5%
|
|
| 2012 | 50 |
15.4%
|
|
| 2013 | 45 |
13.8%
|
|
| 2014 | 41 |
12.6%
|
|
| 2015 | 46 |
14.2%
|
|
| 2016 | 2 |
0.6%
|
|
| Sysmiss | 12082 |