| Value | Category | Cases | |
|---|---|---|---|
| 2016 | 63 |
3.2%
|
|
| 2017 | 290 |
14.7%
|
|
| 2018 | 273 |
13.9%
|
|
| 2019 | 140 |
7.1%
|
|
| 9999 | NO RESPONSE | 5 |
0.3%
|
| Sysmiss | 1196 |
60.8%
|