| Value | Category | Cases | |
|---|---|---|---|
| 2011 | 27 |
1.2%
|
|
| 2012 | 421 |
18.3%
|
|
| 2013 | 454 |
19.7%
|
|
| 2014 | 559 |
24.3%
|
|
| 2015 | 538 |
23.4%
|
|
| 2016 | 305 |
13.2%
|
|
| Sysmiss | 3732 |