| Value | Category | Cases | |
|---|---|---|---|
| 2013 | 2189 |
21.6%
|
|
| 2014 | 2571 |
25.3%
|
|
| 2015 | 2329 |
22.9%
|
|
| 2016 | 2341 |
23.1%
|
|
| 2017 | 722 |
7.1%
|
|
| Sysmiss | 1 |