| Value | Category | Cases | |
|---|---|---|---|
| 2011 | 205 |
7.6%
|
|
| 2012 | 477 |
17.6%
|
|
| 2013 | 523 |
19.3%
|
|
| 2014 | 553 |
20.4%
|
|
| 2015 | 606 |
22.4%
|
|
| 2016 | 344 |
12.7%
|
|
| Sysmiss | 3328 |