| Value | Category | Cases | |
|---|---|---|---|
| 2011 | 407 |
12.7%
|
|
| 2012 | 513 |
16.1%
|
|
| 2013 | 597 |
18.7%
|
|
| 2014 | 582 |
18.2%
|
|
| 2015 | 696 |
21.8%
|
|
| 2016 | 400 |
12.5%
|
|
| Sysmiss | 2841 |