| Value | Category | Cases | |
|---|---|---|---|
| 2009 | 4 |
2.3%
|
|
| 2010 | 53 |
30.6%
|
|
| 2011 | 50 |
28.9%
|
|
| 2012 | 37 |
21.4%
|
|
| 2013 | 18 |
10.4%
|
|
| 2014 | 11 |
6.4%
|
|
| Sysmiss | 2391 |