| Value | Category | Cases | |
|---|---|---|---|
| 2013 | 2248 |
13.5%
|
|
| 2014 | 3632 |
21.8%
|
|
| 2015 | 3346 |
20.1%
|
|
| 2016 | 3232 |
19.4%
|
|
| 2017 | 3277 |
19.7%
|
|
| 2018 | 889 |
5.3%
|
|
| 9999 | NO RESPONSE | 0 |
0%
|
| Sysmiss | 65 |