| Value | Category | Cases | |
|---|---|---|---|
| 2013 | 317 |
17.7%
|
|
| 2014 | 304 |
17%
|
|
| 2015 | 396 |
22.1%
|
|
| 2016 | 400 |
22.3%
|
|
| 2017 | 376 |
21%
|
|
| Sysmiss | 36408 |