| Value | Category | Cases | |
|---|---|---|---|
| 2013 | 557 |
13.2%
|
|
| 2014 | 893 |
21.1%
|
|
| 2015 | 933 |
22%
|
|
| 2016 | 804 |
19%
|
|
| 2017 | 773 |
18.3%
|
|
| 2018 | 274 |
6.5%
|
|
| 9999 | No response | 0 |
0%
|
| Sysmiss | 420 |