| Value | Category | Cases | |
|---|---|---|---|
| 2013 | 9 |
0.6%
|
|
| 2014 | 314 |
20.1%
|
|
| 2015 | 318 |
20.3%
|
|
| 2016 | 294 |
18.8%
|
|
| 2017 | 297 |
19%
|
|
| 2018 | 264 |
16.9%
|
|
| 2019 | 9 |
0.6%
|
|
| 9999 | NO RESPONSE | 1 |
0.1%
|
| Sysmiss | 58 |
3.7%
|